SSC CPO Tier- I Previous Year Paper (Held On: 25 November 2020 Shift 2)

The logic followed here is:

1st column x 3rd column = 2nd column x 4th column

I. 12 x 7 = 14 x 6

84 = 84

III. 14 x 4 = 8 x 7

56 = 56

Similarly,

II. 9 x 10 = 18 x ?

90 = 18 x ?

? = 5

Hence, the correct answer is "5".

The given figure can be seen in the following figure -

Hence, the correct answer is "Option (1)".

According to the given information,

Teachers, Guitarists, Students

So, some teachers are also Guitarists and some students are also Guitarists but there is no relation between teachers and students.

Hence, "option 4" is the correct answer.

Drawing the image according to the given conditions -

It is clear from the image, Hritik is moving in South direction.

Hence, the correct answer is "South".

The pattern follows here is :-

52 - 10 = 42

42 - 8 = 34

34 - 6 = 28

Similarly,

28 - 4 = 24.

Hence, the correct answer is "24".

The logic follows here is:

Alphabets within the words are arranged according to their positions.

The logic is as,

Letters of given words are arranged in alphabetical order from left to right.

 

Therefore, CARPENTER = ACEENPRRT.

Similarly,

 

BLACKSMITH = ABCHIKLMST

Hence, the correct answer is "ABCHIKLMST".

NOTE : In this question place value change or letter shifting method is not applied only letters of the given word are arranged as they are in alphabet from A to Z.

Members: A, B, C, D

Meaning of symbols used in family tree diagram:

According to the information given in the question:

1. A is the elder son of C and the father of D ⇒ A is elder son of C means C has more than one son and A is father of D. 

2. C is the mother-in-law of B, B is not the wife of A ⇒ From these statements, we can say that B is wife of younger son of C.

Family tree diagram: 

A is the father of D, C is the mother of A and B is the sister-in-law of A.

So, B is the aunt of D.

Hence, "Aunt" is the correct answer.

The different positions of the dice are:

In the first two images, 1 is the common side.

The adjacent sides are 3 and 2 in the first image.

The adjacent sides are 5 and 6 in the second image.

So, the numbers on the adjacent faces of the side having the number 1 are 3, 2, 5 and 6.

The remaining side is opposite to the face having number 1. It contains the number 4.

Hence, the correct answer is "4".

Given that Rohit is 18^th from the top, means 17 students are above Rohit,

Rohit is 36^th from the bottom, means 35 students are below Rohit.

  

 

So, total students in the class = 17 + Rohit + 35

= 17 + 1 + 35

= 18 + 35

= 53.

Hence, the correct answer is "53".

The pattern followed here is:

First digit × 3 + 2 = Second digit, Second digit × 3 + 2 = Third digit, and so on.

So, 5 × 3 + 2 = 17

17 × 3 + 2 = 53

53 × 3 + 2 = 161

161 × 3 + 2 = 485

Hence, the correct answer is "161".

The logic here is :-

Barley is a crop and crops are produced in Farms.

The Venn diagram will be :-

Hence, the correct answer is "Option (2)".

Drawing the diagram of Rohit's route,

The school is in North-West direction with respect to Rohit's house.

Hence, the correct answer is "North-West".

In question figure 1 and 2, each arrow is moving backward and forward.

 

Similarly, the same pattern will follow in question figure 3 and 4.

Hence, the correct answer is "option (1)".

The pattern here follows is:

140 = 124 + 16

128 = 140 - 12

136 = 128 + 8

132 = 136 - 4

Similarly,

132 = 132 + 0

Hence, the correct answer is "132".

The logic follows here is :-

Second number = (First number - Third number)2

 First row :

36, 49, 43

36 - 43 = (-7) ; (-7)² = 49

Second row :

42, 64, ?

(42 - ?)² = 64

42 - ? = 8

? = 42 - 8

? = 34

Third row :

24, 36, 30

24 - 30 = (-6) ; (-6)² = 36

Hence, the correct answer is "34".

If we follow this logic :

Second number = (Third number - First Number)2

42, 64, ?

(? - 42)2 = 64

? - 42 = 8

? = 42 + 8

? = 50.

But 50 is not in the options. So we will follow the above logic.

Decoding the giving information,

Given expression,

16 - 4 × 12 ÷ 3 + 18

After changing sign,

16 ÷ 4 + 12 × 3 - 18, 

Using BODMAS rule,

4 + 12 × 3 - 18 

4 + 36 - 18 

40 - 18 

22 

Hence, the correct answer is "22".

The least possible Venn diagram for the given statements is as follow,

Conclusions:

I. All wolfs are jackals → True (It is clear from the Venn diagram as "All wolfs are dogs and all dogs are jackals" so the all wolfs are jackals)

II. All jackals are wolfs → False (It is not possible from the Venn diagram as "All wolf are dogs and all dogs are jackals" so the all jackals are not wolfs)

Hence, "Only conclusion I follows" is the correct answer.

 

Decoding the given information:

The logic is the code for first word is shifted to last and the remaining are as per the order. 

Code for 'Watches' is  '6'.

Code for 'are' is '8'.

Code for 'beautiful' is '5'.

Code for things' is either '3' or '4'.

Code for 'expensive either '3' or '4'.

Code for 'preferred' is '7'.

So, code for 'Watches are preferred' is '876'

Hence, the correct answer is "876".

Mistake Points According to the question, two digits and signs can be interchanged, So you need to change the digits of the given number only, not the number'.

The given expression is as follows,

25 - 9 + 42 ÷ 6 × 7 = 17

Using BODMAS rules,

Option 1 → 5 and 7; - and ÷

27 ÷ 9 + 42 - 6 × 5 = 15

3 + 42 - 6 × 5 = 15 

3 + 42 - 30 = 15

45 - 30 = 15

15 = 15

Option 2 → 9 and 6; + and ×

25 - 6 × 42 ÷ 9 + 7 = 17

25 - 6 × 4.7 + 7 = 17

25 - 28.2 + 7 = 17

25 - 21.2 = 17

3.8 ≠ 17

Option 3 → 4 and 6; + and ÷ 

25 - 9 ÷ 62 + 4 × 7 = 17

25 - 0.145 + 4 × 7 = 17

25 - 0.145 + 28 = 17

25 + 27.85 = 17

52.85 ≠ 17

Option 4 → 2 and 5;  ÷ and × 25 - 9 + 42 ÷ 6 × 7 = 17

52 - 9 + 45 × 6 ÷ 7 = 17

52 - 9 + 45 × 0.85 = 17

52 - 9 + 38.25 = 17

52 + 29.25 = 17

82.25 ≠ 17

Hence, the correct answer is "option (1)".

According to the given information:

I. U was sitting opposite to P, who was to the immediate left of R.

II. S was sitting to the immediate right of U.

III. T was exactly between P and S, so Q was sitting at the remaining place.

Here, Q is sitting exactly opposite of T.

Hence, the correct answer is "Opposite to T".

The family chart is as follows:

Drawing the family tree as per the given information:

As Kanika is the wife of the portrait lady's son, thus the portrait lady related to the mother-in-law of Kanika.

Hence, the correct answer is "Mother-in-Law".

The logic follows here is:

The words are arranged according to the Size of bird.(Small to big)

3. Hummingbird
4. Bulbul
5. Myna
6. Koel
7. Kite

Hence, the correct answer is "3 - 5 - 1 - 4 - 2".

Given equation,

24 * 4 * 16 * 4 * 15 = 85

1. ÷, -, +, ×

Replacing the signs and using BODMAS rule,

24 ÷ 4 - 16 + 4 × 15

6 - 16 + 4 × 15

6 - 16 + 60

66 - 16

50 ≠ 85

2. ÷, +, ×, -

Replacing the signs and using BODMAS rule,

24 ÷ 4 + 16 × 4 - 15

6 + 16 × 4 - 15

6 + 64 - 15

70 - 15

55 ≠ 85

3. -, ÷, +, ×

Replacing the signs and using BODMAS rule,

24 - 4 ÷ 16 + 4 × 15

24 - 0.25 + 4 × 15

24 - 0.25 + 60

84 - 0.25

83.75 ≠ 85

4) ×, +, ÷, -

Replacing the signs and using BODMAS rule,

24 × 4 + 16 ÷ 4 - 15

24 × 4 + 4 -15

96 + 4 - 15

100 - 15

85 = 85

Hence, the correct answer is Option 4.

Let the cost of one cycle tyre be x, and the cost of one tube be y.

Here, The cost of four-cycle tyres and Three tubes is Rs. 720, and The cost of three cycle tyres and four tubes is Rs. 610.

So, 4x + 3y = 720      -----(1)

3x + 4y = 610      ----(2)

Multiplying equation (1) by 3 and equation (2) by 4,

12x + 9y = 2160     ----(3)

12x + 16y = 2440     ----(4)

Subtracting equation (3) from equation (4),

7y = 280

⇒ y = 40

Here, y is the cost of one tube.

Hence, the cost of a tube is "Rs. 40".

The pattern followed is:-

• The shapes are moving anti-clockwise.

The shadings are moving clockwise.

Hence, the correct answer is Option 4.

According to the given information,

 

So, Code for the "Healthy" is 5.

Hence, "5" is the correct answer.

When the paper will be unfolded it will look like this:

Hence, the correct answer is "Option 4".

In 1st and 3nd Dice, E and A letters are common.

then, D is the opposite face of B as B is the opposite face of D.

Similarly,

In 1st and 2nd Dice, D and E letters are common.

then, A is the opposite face of C as C is the opposite face of A.

Similarly,

In 2nd and 3rd Dice, E letter is common,

So, start clockwise from E.

then, C is the opposite face of A and A is the opposite face of C.

Thus, the opposite face of E will be the face that is not shown.

Hence, "C" is the correct answer.

Hint

• When an equal digit is on an equal surface, the remaining equal surface are opposite each other.

The logic followed here is:

Similarly,

Hence, the correct answer is "TACELT".

The pattern that is followed is:

So, SPLI is different from other options.

Hence, the correct answer is "SPLI".

The logic followed here is:

Outer Dots are moving in a 90' Clock-wise direction.

The Star image is rotating 45' Anti-clockwise.

The smaller dot is getting down along the axis as shown in diagrams of inner circles.

 

Hence, the correct answer is "Option1".

The pattern followed here is,

Hence, "340" is the correct answer.

Alternate Method2³ - 3 = 5

3³ - 3 = 24

4³ - 3 = 61

5³ -3 = 122

6³ - 3 = 213

7³ - 3 = 340

Hence, "340" is the correct answer.

The logic followed here is:

48 : 60

4 + 8 = 12

12 + 48 = 60

So, Option 1

64 : 72

6 + 4 = 10

10 + 64 ≠ 72

Option 2

98 : 114

9 + 8 = 17

17 + 98 ≠ 114

Option 3

78 : 94

7 + 8 = 15

15 + 78 ≠ 94

Option 4

86 : 100

8 + 6 = 14

14 + 86 = 100

Hence, the correct answer is "Option 4".

The pattern follows here is:

Hence, the correct answer is "NCYAMAI".

The mirror image of the given diagram, when the mirror is placed at "PQ" is as follows:

Hence, the correct answer is "Option 4".

Option (2) is the embedded in the given figure.

The figure embedded in the given figure is shown by dotted.

Hence, "option (2)" is the correct answer.

The logic here follows is:

Square of first number= Second number × Third number

Row1,

(12)² = (9 × 16)

144 = 144

Row2,

(9)² = (3 × 27)

81 = 81

Similarly,

Row3,

(14)² = (A × 28)

196 = 28A

A = 196 / 28

A = 7

Hence, the correct answer is "7".

Given:

The total age of four persons is 86 years

Formula Used:

The average age of persons = Sum of ages of Persons/number of persons 

Calculation:

According to question,

We have to find the average age of persons 4 years ago

Sum of ages of person 4 years ago = 86 - 4 × 4

⇒ 86 - 16 

⇒ 70

Now, Average age of four persons = 70/4

⇒ 17.5

Hence, the average age of four persons 4 years ago was 17.5

The pattern follows here is :-

Hence, the correct answer is "ZCF".

The pattern followed is :-

Middle terms are Vowels with alternate positions

A - I - U - E - O - A

Hence, the correct answer is "QAJ".

Additional Information

There are five vowels in the alphabets

A, E, I, O, U in the same order.

Given:

Tap A can fill a tank in 4 hours

Tap B can fill the same tank in 8 hours

Tap C can empty the same tank in 6 hours

Concept Used: 

If a tap can fill a tank in n hours then part of the tank filled in 1 hour is 1/n

Calculation:

Time is taken by tap A to fill the tank = 4 hours

Tank filled by tap 1 in one hour = 1/4 part of the tank 

Time is taken by tap B to fill the tank = 8 hours

Tank filled by tap 2 in one hour = 1/8 part of the tank 

Time is taken by tap C to empty the tank = 6 hours

Tank emptied by tap 3 in one hour = 1/6 part of the tank 

So, the part of the tank filled in one hour when all three taps are opened simultaneously 

$\frac{1}{4} + \frac{1}{8} - \frac{1}{6};part$

$⇒ ;\frac{{6 + 3 - 4}}{{24}};part$

$⇒ ;\frac{5}{{24}};part$

⇒ Time taken by 3 taps to fill the tank = 24/5 = 4.8 hours.

∴ time taken by three taps to fill the tank is 4.8 hours.

The pattern followed here is: 

Hence, the correct answer is "MNPK".

The possible Venn diagram for the given statements is:

Conclusions:

I. No bat is a ball → True (Since all bats are sticks and no stick is ball, no bat is ball).

II. No ball is bat → True (Since no bat is ball, the inverse is also true, So, no ball is bat).

Thus, Both the Conclusions are true.

Hence, the correct answer is "Both Conclusion I and Conclusion II Follow".

Additional Information

When the paper is unfolded it will appear like:

Hence, the answer is the figure given below:

Hence, the correct answer is "Option 3".

The correct order as they appear in an English dictionary is:

3. Boater 2. Boathouse 5. Boating 4. Boatman 1. Boatyard

So, the correct order is 3 - 2 - 5 - 4 - 1.

Hence, the correct answer is Option 1.

The logic followed is:-

Code = Sum of the place values - number of vowels.

SUBSTANCE

Sum of place values:

SUBSTANCE = 19 + 21 + 2 + 19 + 20 + 1 + 14 + 3 + 5

= 104

Number of vowels = 3 (SUBSTANCE)

Code = 104 - 3

=101.

SUPREME

Sum of Place values:

SUPREME = 19 + 21 + 16 + 18 + 5 + 13 + 5

= 97

Number of vowels = 3 (SUPREME)

Code = 97 - 3

= 94.

Similarly, 

PORTRAIT

Sum of place values:

PORTRAIT = 16 + 15 + 18 + 20 + 18 + 1 + 9 + 20

=117

Number of vowels = 3 (PORTRAIT)

Code = 117 - 3

= 114.

Hence, the correct answer is "114".

The Correct mirror image of the given figure when the mirror is placed on the right is:

Hence, the correct answer is "Option1".

Additional Information

In a mirror image Left changes to right and the right changes to left vice-versa.

When placement of mirror not given, By default we will assume it in Vertical direction.

The Letter adjacent to the mirror after the mirror image will adjacent to it just with the left change to right and right change to left vice-versa.

The starting letter of the word will be at last after the mirror image drawn with left changes to right and right changes to left.

The logic follows here is :-

Going column wise,

(1^st number) × (2^nd number - (3^rd number) = 4^th number

First column :

9 × 6 - 4 = 54 - 4 = 50

Third column :

7 × 8 - 3 = 56 - 3 = 53

Similarly,

Second column :

8 × 7 - 5 = 51.

Hence, the correct answer is "51".

The pattern followed is :-

  

   

Hence, the correct answer is "XVT".

The correct answer is Health and Family Welfare. 

Key Points

• Dr. Harsh Vardhan is currently serving as Minister of Science and Technology, Minister of Health and Family Welfare and Minister of Earth Sciences.
• He is the Member of Parliament from Chandni Chowk, Delhi constituency.
• Dr. Harsh Vardhan is an ENT surgeon by profession.
• Dr Harsh Vardhan has been elected to the office of Chairperson of Executive Board of the World Health Organization from May 22, 2020.

Additional Information

The correct answer is February 1916.

Key Points

• Gandhiji, the first major public appearance was at the opening of the Banaras Hindu University in February 1916.
• Banaras Hindu University is an internationally reputed temple of learning, situated in the holy city of Varanasi.
• This Creative and innovative university was founded by the great nationalist leader, Pandit Madan Mohan Malviya, in 1916 with the cooperation of great personalities like Dr. Annie Besant, who viewed it as the University of India.
• Banaras Hindu University was created under the Parliamentary legislation - B.H.U. Act 1915.

Important Points

• Mahatma Gandhi, byname of Mohandas Karamchand Gandhi, born October 2, 1869, in Porbandar, India & died January 30, 1948, in Delhi.
• Indian lawyer, politician, social activist, and writer who became the leader of the nationalist movement against the British rule of India.

The correct answer is tropical monsoon rainforest climate.

Key Points

• The climate of Assam is tropical monsoon because of high hills of Arunachal, Manipur, and Mizoram prevent the rain-bearing monsoon winds from escaping this region.
• The Himalayan and the eastern hills ranges cause an orographic rise of the monsoon winds with consequent heavy rainfall in North East India.

Additional Information

The correct answer is Khilafat Movement.

Key Points

• In March 1920 Gandhiji launched the non-violent non-cooperation movement.
• The main aim was to encourage swadeshi principles like hand spinning and weaving and boycott support to the Britishers.
• To establish unity among Hindus and Muslims, Gandhiji joined Khilafat-Movement with the non-cooperation movement.
• The Khilafat movement was launched against Britishers in the support of the Ottoman caliphate.
• It was launched under the leadership of Ali Brothers (Maulana Mohammed Ali and Maulana Shaukat Ali), Maulana Azad, Hakim Ajmal Khan, and Hasrat Mohani.

​

Additional Information

• Swadeshi Movement:
• It was launched on August 7, 1905, in Calcutta.
• The main aim was to boycott British products and encourage swadeshi(Indian) products.
• After the Bengal partition by Lord Curzon on 16 Oct 1905, It spread faster throughout the country.
• Sepoy Mutiny:
• It is also called the First War of Indian Independence.
• A rumor spread among the sepoys that the grease used to lubricate the cartridges was a mixture of pigs’ and cows’ lard which lead to the revolt.
• Civil Disobedience Movement:
• It was launched by Mahatma Gandhi on 12 March 1930.
• The main reason behind the movement was the salt tax imposed by the Britishers.
• Dandi March was on of the biggest movement under it which incorporated huge mass throughout the country.

The correct answer is Chikankari.

Key Points

• Chikankari is one of the important crafts of Uttar Pradesh which entails delicate traditional hand embroidery on fabrics like chiffon, muslin, organza, organdie, and silk.
• Chikankari of Lucknow is a traditional embroidery style of Lucknow, Uttar Pradesh.
• In this art form, the French naut open work and Herringbone stitch techniques are used.
• Chikan saris and Kurtas are the perfect summer wear.
• The most popular origin story credits Noor Jahan, Mughal empress, and wife of Jahangir, with introducing Chikankari to India.
• Chikan embroidery is mostly done on fabrics like cotton, semi-Georgette, pure Georgette, crepe, chiffon, silk, and any other fabric which is light and which highlights the embroidery.
• The fabric cannot be too thick or hard, else the embroidery needle won't pierce it.
• Hence, option 4 is correct.

Additional Information

• Crochet :
• Crochet is a process of creating textiles by using a crochet hook to interlock loops of yarn, thread, or strands of other materials.
• The name is derived from the French term crochet, meaning 'small hook'.
• Hooks can be made from a variety of materials, such as metal, wood, bamboo, or plastic.
• Needle lace :
• It is a type of lace created using a needle and thread to stitch up hundreds of small stitches to form the lace itself.
• In its purest form, the only equipment and materials used are a needle, thread, and scissors.

The correct answer is Peoples Democratic Party*.*

Key Points

• PDP leader Muzaffar Hussain Baig has been honoured with the Padma Bhushan.
• The politician has been awarded for his contribution to "public affairs" and is amongst the 16 people who have been honoured with the Padma Bhushan.
• It is the third highest civilian award after Bharat Ratna and Padma Vibhushan.
• He was among the few politicians from Kashmir who met Members of the European Parliament (MEPs) who had travelled to the valley last year.

Important Points

• BHARAT RATNA
• ​Bharat Ratna is the highest civilian award in the country. It is awarded in recognition of exceptional service/performance of the highest order in any field of human endeavour.
• It is treated on a different footing from Padma Award. The recommendations for Bharat Ratna are made by the Prime Minister to the President of India.
• No formal recommendations for Bharat Ratna are necessary. The number of Bharat Ratna Awards is restricted to a maximum of three in a particular year.
• The government has conferred Bharat Ratna Award on 45 persons to date.
• PADMA AWARDS
• ​Padma Awards, which were instituted in the year 1954, is announced every year on the occasion of Republic Day except for brief interruption(s) during the years 1978 and 1979 and 1993 to 1997.
• The award is given in three categories, namely-
• Padma Vibhushan for exceptional and distinguished service.
• Padma Bhushan for distinguished service of a high order.
• Padma Shri for distinguished service.

The correct answer is carrom.

Important Points

• The carrom game was originated in India.

Key Points

• All-India Carrom Federation conducts the national level championship in India.
• International Carrom Federation conducts the world championships.
• Maria Irudayam hails from Chennai, Tamil Nadu, India.
• Some of the professional carrom athletes:
• A. Appa Rao (Andhra Pradesh)
• Suhas Kambli (Maharastra)
• S. Dilli (Tamil Nadu)

Additional Information

Some Indian Professional athletes in the following games:

Option 1 is incorrect.

Key Points

• Kho-kho, a traditional Indian sport, a form of tag that is one of the oldest forms of outdoor sport. Hence, it is one of India's oldest traditional tag games.
• A team consists of 12 players, one coach, one manager, and other supporting staff. 9 players will take the field at the beginning to start the match. Hence Only 9 Players take the field at the beginning to start the match.
• 3 defenders of the opposite team try to avoid being touched by the chasers. Hence Three defenders of the opposite team try to avoid being touched by the chasers.
• It is a high energy game that involves running and chasing.
• The motive of the sitting team is to "tag" the opponents. Hence It is one of the oldest traditional tag games in India.
• The chasers can run only in one direction and cannot cross the central lane. They have to run around the post to reach another side.
• The other option is to pass the chasing job to another chaser whose back is facing you as you are running.
• The attacker touches the chaser he wants (usually nearest to the target) and utters the word “Kho" loudly to signify the change.

The correct answer: increases.

Key Points

• The solubility of a gas in a liquid depends upon the following factor,
• The nature of the solute.
• The nature of the solvent.
• Pressure:- solubility of a gas in a liquid increase with the increase in pressure.
• The solubility of a gas in a liquid is directly proportional to the partial pressure of the gas present above the surface of liquid or solution.
• The temperature of the solution:- solubility of gases in liquids increases with decrease in temperature.
• It is the reason that aquatic species are more comfortable in cold water rather than in warm water. Because the dissolved oxygen is more in cold water.

The correct answer is a Liquidity trap.

Confusion Points

• The paradox of thrift is an economic theory that argues that personal savings can be detrimental to overall economic growth.
• It is based on a circular flow of the economy in which current spending drives future spending.

Key Points

• A liquidity trap is a situation of the very low rate of interest in the economy where every economic agent expects the interest rate to rise in the future and consequently bond prices to fall, causing capital loss.
• A liquidity trap is an economic situation where everyone hoards money instead of investing or spending it.
• It occurs when interest rates are zero or during a recession.
• People are too afraid to spend so they just hold onto the cash.
• As a result, central banks' use of expansionary monetary policy doesn't boost the economy.
• A liquidity trap is a situation when expansionary monetary policy does not increase the interest rate, income and hence does not stimulate economic growth.
• Hence, option 4 is correct.

Additional Information

• Revenue deficit :
• A revenue deficit occurs when realized net income is less than the projected net income.
• This happens when the actual amount of revenue and/or the actual amount of expenditures do not correspond with budgeted revenue and expenditures.
• Revenue deficit = Total revenue expenditure – Total revenue receipts
• Fiscal deficit = Total expenditure – Total receipts excluding borrowings
• The paradox of thrift :
• The paradox of thrift is a paradox of economics.
• The paradox states that an increase in autonomous saving leads to a decrease in aggregate demand and thus a decrease in gross output which will, in turn, lower total saving.
• The paradox of thrift refers to contrasting implications of savings to households and to the economy as a whole.
• Saving is treated as a virtue by households as they provide a protective umbrella against bad spells but the same is treated as a vice by the economy as it retards the process of income generation.

The correct answer is Kabaddi.

Key Points

• Bengal Warriors, Haryana Steelers and Bengaluru Bulls associated with the Pro Kabaddi League.
• The Pro Kabaddi League is a professional Kabaddi league in India.
• It was founded in the year 2014.
• There is a total of 12 teams in the Pro Kabaddi League as of now.

Additional Information

• The Hockey India League is a professional field hockey league in India. It was founded in the year 2013.
• The Indian Super League is a professional football league in India. It was founded in the year 2013.
• The Indian Premier League is a professional twenty-twenty cricket league in India. 
• The league was founded by the Board of Control for Cricket in India (BCCI) in 2007.
• There are a total of 8 teams in the Indian Premier League as of now.

The correct answer is 1,000.

Key Points

• Coins in India are presently being issued in denominations of 50 paise, one rupee, two rupees, five rupees, ten rupees and twenty rupees.
• Coins up to 50 paise are called 'small coins' and coins of Rupee one and above are called 'Rupee Coins'.
• Coins can be issued up to the denomination of ₹1000 under the Coinage Act, 2011.

Important Points

• Twenty five (25) paise coins have been withdrawn from circulation with effect from June 30, 2011 and are, therefore, no more legal tender.
• The Government of India is responsible for the designing and minting of coins in various denominations.
• The Government of India decides on the quantity of coins to be minted on the basis of indent received from the Reserve Bank on yearly basis.

The correct answer is Hindustan Republican Association.

Key Points

• Kakori train incidient, also called Kakori train robbery or armed robbery on August 9, 1925, of a train in what is now central Uttar Pradesh state, north-central India.
• The robbery took place at the town of Kakori, about 10 miles (16 km) northwest of Lucknow, the train’s final destination.
• The raiders were members of the newly established Hindustan Republican Association (HRA), an organization dedicated to freeing India from British rule through revolution, including armed rebellion.
• Within a month of the attack, more than two dozen HRA members had been arrested for conspiracy and for having perpetrated the act.
• Of those, three including Chandrasekhar Azad, a leader of the HRA remained at large, and two others became witnesses for the prosecution in return for lighter sentences.

The correct answer is poverty line.

Key Points

• In his book "Poverty and the Un-British Rule in India," Dadabhai Naoroji conducted one of the earliest assessments of poverty. 
  

He established a poverty threshold ranging from Rs 16 to Rs 35 per capita per year, using prices from 1867-68 as the basis for his calculations.

• In Poverty and Un-British Rule in India (1901), Naoroji argued that India was too highly taxed and that its wealth was being drained away to England.

Additional Information

• Dadabhai Naoroji, born Sept. 4, 1825, Bombay, died June 30, 1917, Bombay, Indian nationalist and critic of British economic policy in India.
• In 1892, however, he was elected liberal member of Parliament for Central Finsbury, London.
• He became widely known for his unfavorable opinion of the economic consequences of British rule in India and was appointed a member of the royal commission on Indian expenditure in 1895.
• In 1886, 1893, and 1906 he also presided over the annual sessions of the Indian National Congress, which led the nationalist movement in India.

The correct answer is RK Narayan.

Key Points

• ‘The Man-Eater of Malgudi’ is written by RK Narayan.
• The Man-Eater of Malgudi is a 1961 Indian novel, written by R. K. Narayan.
• In this novel, R.K. Narayan uses the historical reference of Bhasmasura.
• Rasipuram Krishnaswami Iyer Narayanaswami, commonly known as R. K. Narayan.
• He was an Indian writer known for his work set in the fictional South Indian town of Malgudi.
• He was a leading author of early Indian literature in English along with Mulk Raj Anand and Raja Rao.
• Hence, option 3 is correct.

Additional Information

• K. R. Narayanan :
• Kocheril Raman Narayanan was an Indian diplomat, academic, and politician.
• who served as the 10th President of India and 9th Vice President of India.
• Books:
• Images and insights, Nehru and his vision, President Speaks: Three Speeches of President K R Narayanan in the 21st Century India, In the Name of the People: Reflections on Democracy, Freedom, and Development
• RK Laxman :
• Rasipuram Krishnaswami Iyer Laxman, commonly known as R. K. Laxman, was an Indian cartoonist, illustrator, and humorist.
• He is best known for his creation The Common Man and his daily cartoon strip.
• Initially, Laxman started with freelance projects.
• He was also a writer and published many short stories.
• Books :
• The best of Laxman, Laugh with Laxman, Dose of laughter, The Hotel Riviera

The correct answer is Subrahmanyam Jaishankar.

Key Points

• The Cabinet Minister in NDA - 2 Government as of 30 June 2020 for the Ministry of External Affairs is Subrahmanyam Jaishankar. 
• Subrahmanyam Jaishankar is an Indian diplomat and politician.
• He is the current Minister of External Affairs of the Government of India since 31 May 2019.
• He succeeded Sushma Swaraj who was the External Affairs Minister in Narendra Modi's Government in his first stint.
• Sushma Swaraj did not contest the elections citing health reasons.
• He is a member of the Bharatiya Janata Party and is a Member of Parliament in the Rajya Sabha since 5 July 2019, representing Gujarat.
• Jaishankar was appointed as Foreign Secretary of India on 29 January 2015.
• Hence, option 1 is correct.

Additional Information

• Nitin Jairam Gadkari:
• Nitin Jairam Gadkari is an Indian politician and businessman from Maharashtra.
• He is the current Minister for Road Transport & Highways and the Minister of Micro, Small and Medium Enterprises in the Government of India.
• Gadkari earlier served as the President of the Bharatiya Janata Party from 2009 to 2013.
• Ravi Shankar Prasad :
• Ravi Shankar Prasad is an Indian lawyer, politician, and the current Union Minister holding the Law and Justice, Electronics and Information Technology, and Communications portfolios in the Government of India.
• A member of the Bharatiya Janata Party, Prasad represents the Patna Sahib constituency.
• Nirmala Sitharaman :
• Nirmala Sitharaman is an Indian economist and politician serving as the current Minister of Finance and Corporate Affairs of India.
• She is a member of the Rajya Sabha, the upper house of the Indian Parliament, since 2014.

The correct answer is The Indian Struggle.

Key Points

• Netaji Subhash Chandra Bose wrote the book the Indian Struggle.
• The Indian Struggle, 1920–1942 is a two-part book by the Indian nationalist leader Netaji Subhash Chandra Bose.
• The first part of The Indian Struggle covering the years 1920–1934 was published in London in 1935 by Lawrence and Wishart.
• The second part dealing with 1935–1942 was written by Bose during the Second World War.
• It covers the 1920–1942 history of the Indian independence movement to end British imperial rule over India.
• The book analyses a period of the Indian independence struggle from the Non-Cooperation and Khilafat Movements of the early 1920s to the Quit India and Azad Hind movements of the early 1940s.
• Hence, option 4 is correct.

Additional Information

• Poverty and Un-British Rule in India :
• Author: Dadabhai Naoroji
• Dadabhai Naoroji through his book, “Poverty and unBritish Rule in India” made the earliest estimation of the poverty line.
• Naoroji was a prominent Indian nationalist and critic of the economic policy of the British Raj in India.
• Through his book 'Poverty and Un-British Rule in India,' he put forward the 'theory of drain of wealth,' which highlighted the exploitation of Indian resources for the benefit of Britain.
• Anandamath :
• Anandamath is a Bengali fiction, written by Bankim Chandra Chattopadhyay and published in 1882.
• It is inspired by and set in the background of the Sannyasi Rebellion in the late 18th century.
• it is considered one of the most important novels in the history of Bengali and Indian literature.
• Unhappy India :
• Author : Lala Lajpat Rai
• Description: India - Social situation and condition, India - Sociology, India - Politics act

The correct answer is Trade and Industry - Infrastructure.

Key Points

• Anil Kumar Manibhai Naik was awarded the Padma Vibhushan Award, 2019 for his contribution in the field of Trade and Industry - Infrastructure.
• Trade and Industry :
• It provides logistics services that reduce the transaction costs of international trade and trade-supporting infrastructural services.
• The development of a country's infrastructure is vital to the growth of its sectors and the overall economy.
• The infrastructure sector primarily comprises electricity, roads, telecommunications, railways, irrigation, water supply and sanitation, ports and airports, storing facilities, and oil and gas pipelines.
• Hence, option 2 is correct.

Additional Information

• Anil Manibhai Naik popularly known as A. M. Naik.
• He is an Indian industrialist, philanthropist, and the Group Chairman of Larsen & Toubro Limited-
• an Indian engineering conglomerate, and since 2018, the Chairman of the National Skill Development Corporation.
• He was awarded the Padma Bhushan, India's 3rd highest civilian award, in 2009.
• In 2019, he was awarded the Padma Vibhushan, India's 2nd highest civilian award.
• Naik is also the recipient of the 'Economic Times - Business Leader of the Year Award, for the year 2008.
• In 2018, the Government of India appointed Naik the Chairman of the National Skill Development Corporation –
• The apex body to promote skilling and part of the Skill India Mission of the Prime Minister.

The correct answer is Ektara.

Important Points

• A bamboo is inserted through the center of the gourd, the upper side of the gourd sliced out and covered with skin.
• The string used is a single steel string.

Key Points

• The word Ektara is derived from two words, Ek meaning “one” and tara meaning “string”.
• It is a one-stringed musical instrument that can produce a wide variety of tunes and melodies.
• Ektara
• 
• Esraj
• 
• Edakka
• 
• Ekkalam
• 

Additional Information

           Some other musical instruments

The correct answer is unplanned decumulation of inventory.

Key Points

• Inventories are the unused raw materials or unfinished goods and unsold goods, that a firm carries from a year to the next year.
• Change in inventories may be planned or unplanned.
• An unexpected decrease in the stock of goods due to the rise in sales is called unplanned decumulation of inventory.

​

Additional Information 

• An unexpected increase in the stock of goods due to a fall in sales is called the unplanned accumulation of inventories.
• The planned accumulation of inventories based on the anticipated sales for a particular period or year is called planned accumulation of inventories.
• Similarly, the planned decumulation of inventories based on the anticipated sales for a particular period or year is called planned decumulation of inventories.
• Final inventory is calculated as:
• Final Inventory = Opening Inventory + Production - Sale.

The correct answer is Infra-red waves.

Key Points

• The Infra-red waves are waves having a wavelength longer than a visible light wave.
• The wavelength Infra-red waves are more than 700nm.
• The Infra-red waves are also known as heat waves.
• When materials are exposed to the infrared radiation thermal motion of the molecules heats that material.
• The Infrared radiation is used in industrial, scientific, military, commercial, and medical applications such as target acquisition, surveillance, night vision, homing, and tracking etc.
• .

Additional Information

• The Light waves are the electromagnetic waves of the wavelength of range 400nm to 700nm which are visible to the human eye is known as a light wave.
• Waves having a wavelength below 400nm are Ultraviolet radiations.
• The Gamma rays are electromagnetic radiation produced during the disintegration of radioactive atomic nuclei and in the decay of certain subatomic particles.
• The term gamma-ray was coined by Ernest Rutherford in 1903.
• The X-ray is an electromagnetic radiation of the extremely short wavelength and high frequency.
• The wavelength of X-ray ranges from about 0.001nm to 10nm.
• X-rays were discovered by Wilhelm Konrad Rontgen, in 1895.

The correct answer is Andhra Pradesh.

Key Points

• The Neeru-Meeru (Water and You) programme was launched by the Water Conservation Mission(WCM), on May 1, 2000.
• It is a Water conservation and poverty alleviation initiative undertaken by the government of Andhra Pradesh.
• The initiative focuses on overcoming man made-drought and water shortage in the state by the convergence of efforts of various departments at the state, district, and sub-district levels for water conservation.

Additional Information 

• Features of Neeru-Meeru are:
• Rainwater harvesting works
• Mobilization of financial resources
• Prioritization of areas
• Quality improvement
• Water audit
• Despite a 7% deficit in rainfall, the groundwater levels registered a rise of 0.19 to 6.34 meters in groundwater levels.
• The process of implementing land-use practices and water management practices to protect and improve the quality of the water is called watershed management.
• It also helps in improving natural resources within a watershed by managing the use of those land and water resources in a comprehensive manner.

The correct answer is 24.56%.

Key Points

• ISFR is a biennial publication of the Forest Survey of India (FSI), which is an organization under the Ministry of Environment Forest & Climate Change.
• In the 16th biennial assessment of 2019:
• Total forest and tree cover is 24.56% of the geographical area of the country.
• The Total forest cover is 7,12,249 sq km which is 21.67%.
• The Tree cover is 2.89%.

Additional Information 

• States having maximum Forest Cover (Area-wise):
• Madhya Pradesh
• Arunachal Pradesh
• Chhattisgarh
• Odisha
• Maharashtra.
• States having maximum Forest Cover (Percentage):
• Mizoram (85.4%)
• Arunachal Pradesh (79.63%)
• Meghalaya (76.33%)

The correct answer is Badminton.

Key Points

• Chennai Superstarz, Awadhe Warriors and Mumbai Rockets associated with the Premier Badminton League.
• The Premier Badminton League is one of the top badminton leagues in the world.
• It was started in January 2016.
• The 5th season of the PBL is going to held from 20 January 2020 to 9 February 2020.
• The league comprises of seven franchises from Mumbai, Lucknow, Bengaluru, Chennai, Hyderabad, Pune and Guwahati.

Additional Information

• The Hockey India League is a professional field hockey league in India. It was founded in the year 2013.
• The Indian Super League is a professional football league in India. It was founded in the year 2013.
• The Pro Kabaddi League is a professional Kabaddi league in India. It was founded in the year 2014.

The correct answer is Michael Faraday.

Key Points

• According to Faraday’s laws of electrolysis.
• The amount of chemical change produced by the current at an electrode-electrolyte boundary is proportional to the quantity of electricity used.
• The amounts of chemical changes produced by the same quantity of electricity in different substances are proportional to their equivalent weights.
• It was described by Michael Faraday in 1833.

Additional Information

• John Dalton is known for the Dalton atomic theory.
• Joseph Fourier is known for the Fourier series, the Analytical Theory of Heat, Fourier heat conduction test.
• Alfred Nobel is known for the invention of Dynamite.

The correct answer is Electromagnetic.

Key Points

• EM waves are the result of vibrations between an electric field and a magnetic field.
• Electromagnetic waves are nothing but time-varying electric and magnetic fields that are perpendicular to each other.
• Both electric and magnetic fields are perpendicular to the direction of propagation.
• The electromagnetic field is produced by an accelerating charged particle.
• Few examples of EM waves include visible light waves, X-rays, gamma rays, radio waves, etc.

​

Additional Information

​

The correct answer is 2 October 1904.

Important Points

• He was the second Prime Minister of India.
• He gave the famous slogan "Jai Jawan, Jai Kishan" during the Indo-Pak war 1965.
• He was awarded Bharat Ratna (posthumous) in 1966.

Key Points

• Lal Bahadur Shastri was born on October 2, 1904, at Mughalsarai, a small railway town seven miles from Varanasi in Uttar Pradesh.
• He held the Prime Minister's office from 9 June 1964 to 11 January 1966.
• He supported and promoted the White Revolution and Green Revolution.
• He was the key person in setting up the Food Corporation of India.
• He led India in the India-Pakistan War in 1965.
• He died in Tashkent, Uzbekistan (then the Soviet Union) on 11 January 1966, one day after signing a peace treaty (Tashkent Agreement) to end the 1965 Indo-Pakistan War.

Additional Information

• Mahatma Gandhi was born on 2nd October 1869 in Porbandar, Gujarat.

The correct answer is Assam.

Key Points

• Assam is a north-eastern state in India.
• Assam became a constituent state of India in 1950.
• Capital of Assam- Dispur.
• Official language- Assamese.
• Important festival- Bihu.
• It is famous for tea plantations, its silk, flora, and fauna.
• One-Horned Indian Rhino is found only in Assam's Kaziranga National Park which is also a world heritage site.
• Digboi oil refinery in Assam is the first refinery and oldest in Asia.

Additional Information

                          Northeastern states of India

The correct answer is Meghalaya.

Key Points

• In India, tertiary coals occur in Assam, Arunachal Pradesh, Nagaland, and Meghalaya.
• Tertiary coal is found in the rocks of the Oligocene period of the Tertiary Era.
• Tertiary coal fields share only 1% of the coal production of India.
• Tertiary coal is also known as 'brown coal'.
• Tertiary coal contributes only about two per cent of the total coal production of the country.
• Hence, option 2 is correct.

Additional Information

• Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams.
• Coal is the foremost power resources in India and is the most abundantly available fossil fuel.
• India is highly dependent on coal for meeting its commercial energy requirements.
• Coal is found in a variety of forms depending on the degrees of compression and the depth and time of burial.
• Types of Coal :
• Anthracite (more than 80% carbon content):
• In India, it is found only in Jammu and Kashmir.
• Bituminous (60 to 80 % Carbon Content):
• It is the second-best quality of coal.
• It is the most popular coal in commercial use.
• Peat (less than 40% carbon content)
• Lignite :
• It is low-grade brown coal, which is soft with high moisture content.
• The principal lignite reserves are in Neyveli in Tamil Nadu and are used for the generation of electricity.
• The Damodar Valley Coalfield is the largest coalfield in India that extended to Jharkhand and West Bengal.
• Jharia in Jharkhand is the largest coal mining field.

The correct answer is He was the first recipient of the Padma Shree Award.

Key Points

• C Rajagopalachari was an Indian politician, freedom fighter and member of the Constituent Assembly from Madras.
• He was a senior leader of the Indian National Congress.
• He was the first and last Indian Governor-General of free India.
• He was known for the formulation of the proposal to solve the political deadlock between the All India Muslim League and the Indian National Congress in 1944, popularly known as Rajagopalachari's formula.
• He was one of the first recipients of the Bharat Ratna along with Sarvepalli Radhakrishnan and C. V. Raman, in 1954.
• He was the recipient of the Sahitya Akademi Award for the Tamil language for his work retelling of the Ramayana – Chakravarti Thirumagan.
• He founded the Swatantra Party in 1959.

The correct answer is pathogens.

Key Points

• A pathogen is an organism that causes disease.
• Pathogens can be transmitted in a few ways depending on the type.
• They can be spread through skin contact, bodily fluids, airborne particles, contact with feces, etc.
• There are different types of pathogens out of which the four most common types are viruses, bacteria, fungi, and parasites.
• Viruses are made up of a piece of genetic code, such as DNA or RNA, and protected by a coating of a protein called a capsid.
• Bacteria are microorganisms made of a single cell and those bacteria which cause infection are called pathogenic bacteria.
• Fungi cells contain a nucleus and other components protected by a membrane and a thick cell wall.

Additional Information

• Parasites are organisms that behave like tiny animals, living in or on a host and feeding from the host. It includes:
• Protozoa are single-celled organisms that can live and multiply in the body.
• Helminths are larger, multi-celled organisms that can live inside or outside the body and are commonly known as worms.
• Predators are animals that kill and eat other animals.
• Antigens are substance that enters the body and starts a process that can cause disease.
• The body then usually produces substances (antibodies) to fight the antigens.
• Frugivores are animal that feeds on fruit.

The correct answer is Ionic.

Key Points

The correct answer is Janta Dal (United).

Key Points

• Janta Dal (United) is abbreviated as JD(U).
• JD(U) operates on the ideologies of socialism, secularism, and integral humanism.
• It was founded on 30 October 2003 by Nitish Kumar and Sharad Yadav.
• The JD(U) was formed with the merger of the Janata Dal, the Lok Shakti, and the Samata Party.
• JD(U) is currently heading the Government in Bihar.
• Ramchandra Prasad Singh is the current president of JD(U).

Additional Information

All India Trinamool Congress.

Samajwadi Party

Communist Party of India Marxist

The correct answer is Mir Jafar.

Important Points

• The Battle of Plassey was fought in the year 1757.
• It was fought between Siraj-Ud-Daulah (Nawab of Bengal) and East India Company lead by Robert Clive.

Key Points

• The Battle of Plassey become famous because it was the first major victory the Company won in India.
• Another reason for the defeat was that Clive had managed to secure the support of Mir Jafar by promising to make him the Nawab after crushing Siraj-Ud-Daulah.

Additional Information

• Mir Jafar was made the puppet ruler of the Britishers but he could not prove himself.
• Then, the Britishers removed Mir Jafar and made Mir Qasim the Nawab of Bengal but he also complained about the policies of Britishers.
• Another famous battle took place between Mir Qasim and East India Company i.e Battle of Buxar in 1764.
• And again Mir Jafar was made the Nawab of Bengal by Britishers.

The correct answer is Greenhouse effect.

Key Points

• The greenhouse effect is a process that occurs when gases in Earth's atmosphere trap the Sun's heat.
• This process makes Earth much warmer than it would be without an atmosphere.
• A greenhouse is a building with glass walls and a glass roof and used to grow plants.
• It leads to an increase in the Earth's temperature because the glass walls of the greenhouse trap the Sun's heat.

Additional Information 

• Radiation is the energy that comes from a source and travels through space at the speed of light like heat, light, ultraviolet rays, etc.
• The increase in the Earth's average temperature over the past few decades is called Global warming.
• Global warming occurs when carbon dioxide (CO2) and other air pollutants and greenhouse gases are collected in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth’s surface.

The correct answer is Best Playback Singer (Male).

Important Points

• Arijit Singh was awarded the Best Playback Singer (Male) for the song 'Kalank'.
• Shilpa Rao was awarded the Best Playback Singer (Female) for the song 'Ghungroo'.

Key Points

• The Filmfare Awards are a set of awards that honour artistic and technical excellence in the Bollywood film industry of India.
• The 65th Filmfare Awards event was held on the 16th of February 2020 at Sarusajai Stadium in Guwahati, Assam.
• Gully Boy won a total of 13 awards in the 65th Filmfare Awards.
• Some of the awards are:
• Best Film
• Best Director- Zoya Akhtar
• Best Actor- Ranveer Singh
• Best Actress- Alia Bhatt
• Best Supporting Actor- Siddhant Chaturvedi
• Best Supporting Actress- Amrutha Subhas

The correct answer is Makkal Needhi Maiam.

Key Points

• Mr. Kamalhaasan, the founder President of Makkal Needhi Maiam, fondly referred to as Nammavar has dominated the Indian filmdom as an unparalleled epitome of cinema.
• He formed his political party, Makkal Needhi Maiam, on February 21, 2018, in Madurai.
• Actor-politician Kamal Haasan’s party Makkal Needhi Maiam (MNM) has approached the Madras high court for the ‘battery-torch’ symbol to be reassigned to them for Tamil Nadu’s assembly election in 2021.

The correct answer is Kohlrausch.

• Kohlrausch’s law states that the equivalent conductivity of an electrolyte at infinite dilution is equal to the sum of the conductances of the cations and anions.
• Molar conductivity - It is the conductance of the volume of solution containing one mole of electrolyte kept between two electrodes with the unit area of cross-section and unit distance.
• With the decrease in concentration, the molar conductivity of a solution increases.
• This increase in molar conductivity is because of the increase in the total volume containing one mole of the electrolyte.
• The conductivity of a solution at zero concentration is known as limiting molar conductivity.

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• Dirac's equation describes how charged particles like electrons behave when they travel close to the speed of light.
• Schrodinger's wave equation describes the energy and position of the electron in space and time domain and gives an idea about the wave nature of the electron inside an atom.
• Feynman gave 'The Character of Physical Law'.

The correct answer is Karnataka.

• Bhootada Kola is performed by a trained person who is believed to have temporarily become a god himself.
• The performer displays an aggressive outlook, dances fiercely, and performs multiple rituals.
• This performer is feared and respected in the community and is believed to give answers to people’s problems on behalf of god.
• Drums and music give company to the dancing and pooja rituals.
• By praying together during Bhootada Kola, the community seeks God’s blessing, prosperity, and riddance of various problems the community is challenged with.
• Bhootada Kola is said to have some influence from Yakshagana, a more popular and widely performed folk dance in coastal Karnataka.

• Bhootha Aradhane or Holy spirit worship is very common in the coastal towns of Karnataka.
• Bhootada Kola is performed in small local communities in rural parts of Dakshina Kannada and Udupi districts.
• Bhootada Kola is not a tourist event and is not advertised much in mainstream media.

The correct answer is benign.

Key Points

• Cell growth and differentiation is highly controlled and regulated. In cancer cells, there is breakdown of these regulatory mechanisms.
• Normal cells show a property called contact inhibition by virtue of which contact with other cells inhibits their uncontrolled growth.
• Cancer cells appears to have lost this property. As a result of this, cancerous cells just continue to divide giving rise to masses of cells called tumors.
• Tumors are of two types-
• Benign- Benign tumors normally remain confined to their original location and do not spread to other parts of the body and cause little damage.
• Malignant- The malignant tumors, on the other hand are a mass of proliferating cells called neoplastic or tumor cells.
• These cells grow very rapidly, invading and damaging the surrounding normal tissues.

The correct answer is the anode.

Key Points

• The galvanic cell is an electrochemical cell in which an electric current is generated from redox reactions.
• In a galvanic cell, the half-cell in which oxidation takes place is called the anode and it has a negative potential with respect to the solution.
• The other half-cell in which reduction takes place is called the cathode and it has a positive potential with respect to the solution.
• The galvanic cell or voltaic cell was named after the scientists Luigi Galvani and Alessandro Volta.

Additional Information

• A diode is a two-terminal electronic device made of a semiconductor.
• It is a unilateral device i.e. it conducts current in only one direction.
• A diode is used as a rectifier, LED,  in charging devices and in many electronic devices where the unidirectional flow of current is required.
• Triode is an electron tube consisting of three electrodes, cathode filament, anode plate, and control grid which is mounted in an evacuated metal or glass container.
• It is used as an amplifier for both audio and radio signals, and as an oscillator in electronic circuits.

The correct answer is refraction.

Key Points

• The phenomenon of refraction occurs because of the difference in the refractive index of the media since the speed changes.
• This change in speed leads to a change in direction.
• Laws of refraction:
• The incident ray, refracted ray, and the normal to the interface of two media at the point of incidence all lie on the same plane.
• The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant. It is called Snell’s law of refraction.
• When light travels from a denser medium to a rarer medium, it bends away from the normal.
• When light travels from a rarer medium to a denser medium, it bends towards the normal.

Additional Information 

• Diffraction - It is the bending of light around the corners where it spread in the form of bright and dark fringes.
• Obstruction - Something that blocks the ray of light.
• Reflection - The bouncing back of light from a surface is called reflection.
• The angle of incidence(i) is equal to the angle of reflection(r).

The correct answer is parthenogenesis.

Key Points

• Parthenogenesis is a mode of reproduction in which an egg is developed into an embryo without being fertilized by a sperm.

Additional Information

• A process by which one organism produces offsprings is known as reproduction.
• There are basically two modes of reproduction,
• Sexually reproduction
• Asexually reproduction
• Sexually reproduction:- Mode of reproduction in which male and female gamete fuse to form a zygote. Humans and mammals undergo sexual reproduction.
• Asexually reproduction:- Mode of reproduction in which only one organism is involved. Amoeba, Sponges, ants, reptiles undergo asexual reproduction.
• Different modes of asexual reproduction are 
• Fragmentation
• Regeneration
• Parthenogenesis
• Gemmules
• Budding
• Apomixis is a mode of asexually reproduction in the plant, actually, seed formation is in a plant without fertilization.

The correct answer is East Delhi.

Key Points

• Gautam Gambhir had won the East Delhi Lok Sabha constituency seat.
• He had defeated Congress candidate Arvinder Singh Lovely by 3,91,222 votes.
• BJP alone fetched 302 seats out of 541 Lok Sabha seats and formed the government for the second time.

Additional Information 

• South Delhi - Ramesh Bidhuri of the Bharatiya Janata Party (BJP) in the 2019 Lok Sabha Elections beat Raghav Chadha of the Aam Aadmi Party (AAP) by receiving 56.58% of the votes.
• West Delhi - Parvesh Sahib Singh Verma of the Bharatiya Janata Party (BJP) in the 2019 Lok Sabha Elections beat Mahabal Mishra of the Indian National Congress (INC) by receiving 60.05% of the votes.

The correct answer is Jamshedi Navroz.

Key Points

• Jamshedi Navroz is a festival of Zoroastrian origin that marks the day of the vernal equinox in March every year and is celebrated by Parsis in India.
• The Parsi New Year is a regional holiday celebrated on the first day of the Zoroastrian calendar’s first month, Farvardin.
• It is also known as Navroz, which is derived from ‘Nav’ and ‘Roz’, meaning new and day respectively in Persian.
• The festival falls every year on Spring Equinox around 21st March.
• But the Parsi community in India follows the Shahenshahi calendar and thus celebrates their new year later in July or August.
• In 2021, the Parsi New Year will be observed on 16th August (Monday) in India.
• Hence, option 3 is correct.

Additional Information

• Places to Observe Parsi New Year’s Day in India:
• Gujarat, Maharashtra
• On this day, Parsis clean the house and decorate with flowers and rangoli to make it look beautiful and welcoming for visitors.
• Dressed up in traditional attire, they visit the Fire Temple after breakfast and perform a prayer called Jashan to express gratitude to the Lord, pray for prosperity and seek His forgiveness.
• Milk, water, fruits, flowers, and sandalwood are put into the sacred fire as offerings.
• Frawardigan :
• Frawardigan is a ten-day period at the end of the Zoroastrian religious year during which the souls of the dead are commemorated.
• The name frawardigan is a Zoroastrian Middle Persian allusion to the fravashis, which – among other aspects – also include the souls of the dead.
• Khordad Sal :
• Khordad Sal is the birth anniversary of Zoroaster.
• Zoroastrians all over the world, especially the Parsis of India, celebrate the day in great glamour.
• Parties and ghambars are held.
• Special prayers and jashan are also held throughout the entire day.

The correct answer is land ceiling.

Key Points

• The Urban Land Ceiling Act that was passed in 1976 proposed that there should be an equal distribution of land in urban agglomerations to subserve the common good.
• Land Ceiling means fixing the maximum size of landholding that an individual/family can own.
• Land over and above the ceiling limit is called surplus land.
• Why ceiling on land holdings is needed?
• Article 38 seeks to minimize the inequalities of income, status, facilities, and opportunities. Land ceilings minimize inequality in land ownership and thus reduces inequality of income.
• Article 39 seeks to ensure that the operation of the economic system does not result in the concentration of wealth and to give the right to adequate means of livelihood for all citizens.
• Benefits of Land Ceiling
• Employment Increased
• Social justice
• Naxal reduced

The correct answer is Shaurya Chakra.

Key Points

• The Ashok Chakra Class-III was renamed as the Shaurya Chakra in 1967.
• The medal was originally established on 4 January 1952 as the "Ashoka Chakra, Class I".
• As the first step of a three-class sequence of non-combatant bravery decorations.
• In 1967, these decorations were removed from the "class-based" system and renamed as the Ashoka Chakra, and Shaurya Chakra.
• The Ashoka Chakra is India's highest peacetime military decoration awarded for valour, courageous action or self-sacrifice away from the battlefield.
• Flt. Lt. Suhas Biswas was the first Indian Air Force officer to be awarded the Ashoka Chakra.
• A recipient can be awarded the Kirti Chakra or Shaurya Chakra in addition for separate acts of gallantry.
• Hence, option 1 is correct.

Additional Information

• Kirti Chakra :
• Kirti Chakra was known as Ashok Chakra, Class II before 1967.
• The Kirti Chakra is an Indian military decoration awarded for valour, courageous action or self-sacrifice away from the field of battle.
• It may be awarded to civilians as well as military personnel, including posthumous awards.
• It is the peacetime equivalent of the Maha Vir Chakra.
• Mahavir Chakra :
• The Maha Vir Chakra is the second-highest military decoration in India, after the Param Vir Chakra.
• It is awarded for acts of conspicuous gallantry in the presence of the enemy, whether on land, at sea or in the air.
• It replaced the British Distinguished Service Order.
• The medal may be awarded posthumously.
• Vir Chakra :
• Vir Chakra is an Indian gallantry award presented for acts of gallantry in the presence of the enemy on the battlefield.
• It replaced the British Distinguished Service Cross, Military Cross and Distinguished Flying Cross.
• Award of the decoration carries with it the right to use Vr.C. as a postnominal abbreviation.

The correct answer is Adam Smith.

Key Points

• ‘An Enquiry into the Nature and Cause of the Wealth of Nations’ is an influential work by economist Adam Smith.
• classical capitalism was expressed in An Inquiry into the Nature and Causes of the Wealth of Nations (1776).
• By the Scottish economist and philosopher Adam Smith, which recommended leaving economic decisions to the free play of self-regulating market forces.
• Adam Smith's purpose in writing The Wealth of Nations was to critique and offer an alternative to the mercantilist economic system, which he believed would eventually stifle countries' productivity.
• Adam Smith was a Scottish economist, philosopher as well as a moral philosopher, a pioneer of political economy.
• Books :
• The Theory of Moral Sentiments (1759), An Inquiry into the Nature and Causes of the Wealth of Nations (1776).
• Hence, option 1 is correct.

Additional Information

• Millicent Fawcett :
• Millicent Garrett Fawcett was an English politician, writer, and feminist.
• She campaigned for women's suffrage through legislative change and led Britain's largest women's rights association, the National Union of Women's Suffrage Societies, from 1897 to 1919.
• Books :
• Women's suffrage, What I Remember, Janet Doncaster.
• Alfred Marshall:
• Alfred Marshall was an English economist, who was one of the most influential economists of his time.
• His book, Principles of Economics, was the dominant economic textbook in England for many years.
• It brings the ideas of supply and demand, marginal utility, and costs of production into a coherent whole.
• Books :
• Money, Credit & commerce, Element of Economics, Industry, and Trade.
• John Maynard Keynes :
• John Maynard Keynes was an English economist, whose ideas fundamentally changed the theory and practice of macroeconomics and the economic policies of governments.
• Book :
• The General Theory of Employment, Interest, and Money, The Collected writings, The Essential Keynes.

The correct answer is Jal Kranti Abhiyan.

Key Points

• Jal Kranti Abhiyan is being celebrated during the year 2015-16 to consolidate water conservation and management in the country through a holistic and integrated approach involving all stakeholders, making it a mass movement.
• Jal Kranti Abhiyan was launched on 5th June 2015 across the country.
• Jal Kranti Abhiyan is used in strengthening grass root involvement of all stakeholders including Panchayati Raj institutions and local bodies in the water security and development schemes e.g. Participatory Irrigation Management (PIM).

Important Points

• The activities being undertaken by the Abhiyan are:-
• Jal Gram Yojana
• Development of Model Command Area
• Pollution abatement
• Mass Awareness Programme
• Other Activities

The correct answer is Kalasha.

Key Points

• Kadsa dance is a dance style performed carrying a ‘Kalasha’
• In this dance style, women perform carrying a ‘Kalash’ on their shoulders or heads.
• This dance style match step by step with hopes of life which expresses this sophisticated feeling beautifully.
• Paika,Jhumair, Mardana Jhumair, Janani, Jhumair, Domkach, santhal are some of the folk dance of Jharkhand.

Additional Information

Formula used:

Central angle of pie chart = (given frequency/total frequency) × 360°

Calculation:

Number of students who scored marks between 200 and 300 = 45 + 60 = 105

Total students = 30 + 45 + 60 + 35 + 40 + 35 = 245

Central angle of pie chart = 105/245 × 360° = 154°

∴ The central angle of the sector representing  marks 200 or more but less that 300 is 154°

Given:

Money borrowed = Rs. 16,000

Party expenses = Rs. 20,000

Calculation:

Let the Monthly income be 100%

Money left = 100% -(40% + 18% + 12% + 5%)

Money left = 100% - 75% = 25%

Ramesh party expenses was Rs. 20,000 and he borrowed Rs. 16,000

So, he had Rs. 4,000 in his pocket 

That means 25% = 4000

100% = 4000 × (100/25)

100% = 16000

∴ The monthly income of Ramesh is Rs. 16,000

Given:

Loss of an article = 13.5%

If sold for Rs.1104 more profit will be 9.5%

Calculation:

Let us take the cost price be x

Loss % of x + extra amount = profit % of x

-13.5% of x + 1104 = 9.5% of x

NOTE: Negative sign indicates the loss

⇒ 23% of x = 1104

⇒ x = (1104 × 100)/23

∴ x = Rs.4800

∴ The cost price of the article = Rs.4800

Given:

The capacity of cylinders A and B are equal.

Volume_(A) = Volume_(B) 

The ratio of diameters = A ∶ B = 1 ∶ 4

Formula Used:

Volume of cylinder = πr² h

Diameter = 2 × r

Where,

r → Radius of the cylinder 

h → Height of the cylinder 

Calculation:

r = D/2

The ratio of the radius of A and B

$\Rightarrow \frac{{Diamater;of;A}}{{Diameter;of;B}} = 1/4$

The capacity of cylinders A and B are equal.

Volume(A) = Volume(B) 

⇒ π× r_(A)²× h_(A) = π× r_(B)²× h_(B)

⇒ r(A)2× h(A) = r(B)2× h(B)

⇒ r(A)2/r(B)2 =  h(B)/ h(A)

⇒1²/4² = h(B)/ h(A)

⇒1/16 = h(B)/ h(A)

⇒  h_(A)/h_(B) = 16/1

⇒ h(A) : h(B) = 16 : 1

∴ The ratio of the heights of A and B is 16 ∶ 1.

Given:

The number of students in Arts in 2011, 2012, 2013, and 2014 are 30, 50, 20, and 20 respectively.

Formula used:

Average = Sum of observations/Number of observations

Calculation:

Average = (30 + 50 + 20 + 20)/4

⇒ 120/4 = 30

∴ The average  number of Arts students in the given classes is 30.

Given:

The average age of 40 students = 16 years

On admission of 10 new students average = 15 years

Average of 5 new students = 11

Formula used:

${\rm{Average}} = \frac{{{\rm{sum;of;all;the;values}}}}{{{\rm{number;of;values}}}}$

Calculation:

Sum of all ages of 40 students = 40 × 16

⇒ 640 years

After admission of 10 new students, number of students now = 40 + 10

⇒ 50

Sum of all ages after the admission of 10 new students = 50 × 15

⇒ 750 years

Sum of ages of 5 new students = 5 × 11

⇒ 55 years

Now remaining ages of 5 new students = Sum of all ages after the admission of 10 new students - Sum of all ages of 40 students - Sum of ages of 5 new students

⇒ 750 – 640 – 55

⇒ 750 – 695

⇒ 55 years

Average of 5 new students = 55/5

⇒ 11

Hence, the Average of 5 new students is 11.

Given:    

Five  bell rings together at the intervals of 3,5,8,9 and 10 second

 Calculation: 

By taking the LCM for 3, 5, 8, 9 and 10 seconds = 360 seconds 

⇒1 minute = 60 second 

So that,1 seconds= 1/60 min

⇒ 360 seconds = 360/60 = 6 minutes

∴ All the bell rings together in 6 minutes.

Given:

$\cot \theta = \frac{1}{{\sqrt 3 }}$

θ = 60°

Calculation:

 sin 60° =$\frac{{\sqrt 3 }}{2}$  

 cos 60° = $\frac{1}{2}$

 cosec 60° =$\frac{2}{\sqrt3}$

 sec 60° = 2 

substituting the value in the given expression  

 = $\frac{2-\frac{3}{4}\ }{1-\frac{1}{4}}+(\frac{4}{3}\ -2)$ ⇒$\frac{\frac{5}{4}\ }{\frac{3}{4}}-\frac{2}{3}$

 = $\frac{{5;}}{3} - \frac{2}{3} = 1$

∴ the value for the $\frac{{2 - {{\sin }^2}\theta }}{{1 - {{\cos }^2}\theta }} + (cose{c^2}\theta - {\sec} \theta )$ = 1

Given:

R = 10%

T = 2 years

SI = Rs.8,100

R₂ for CI = 15%

Formula Used:

S.I. = (P × R × T)/100

A = P(1+ R/100)T

C.I. = A – P

Where, 

P → Principle

T → Time

R → Rate

A → Amount 

Calculation:

S.I. = (P × R × T)/100

⇒ 8,100 = (P × 2 × 10)/100

⇒ 8,100 = P/5

⇒ P = 5 × 8,100

⇒ P = 40,500

Now for C.I.

A = P(1+ R/100)T

⇒ A = 40,500(1 + 15/100)² 

⇒ A = 40,500(1 +3/20)²

⇒ A = 40,500(23/20)² 

⇒ A = 40,500 × (23/20) × (23/20)

⇒ A = 53561.25

CI = A – P

⇒ C.I. = 53561.25 – 40500 = Rs. 13,061.25 ≈ Rs. 13,061

∴ The required compound interest is Rs. 13,061

Alternate Method10% for 2 years = 20% of principle = 8100

⇒ 20P/100 = 8100

⇒ P = 40500

Equivalent rate of interest for 2 years = 15 + 15 + (15 × 15)/100 = 32.25%

C.I. = 32.25% of 40500

⇒ 32.25 × 40500 /100 =  Rs. 13061.25 ≈ Rs. 13061

∴ The required CI is Rs. 13061.

Given:

**∠**QUR = 59°

Formula used:

External angle bisector theorem

In ΔABC if external angle bisectors of angle ∠B and ∠C meet at point D, then

∠D = 90 – ∠A/2

Calculation:

By theorem,

∠QUR = 90 – ∠P/2

⇒ ∠P/2 = 90 – 59

⇒ ∠P/2 = 31

⇒ ∠P = 62

∴ The measure of ∠P is 62.

Given:

Length = 12 m

Breadth = 8 m

Height = 10 m

Cost of 1 m²  wall painting = Rs. 25 

Formula used:

Area of four walls = 2(l + b) × h

Where,

Length = l 

Breadth = b 

Height = h

Calculation:

Area of four walls = 2(l + b) × h

⇒ 2(12 + 8) × 10

⇒ 2 × 20 × 10

⇒ 400 m²

Cost of 1 m2 wall painting = Rs. 25 

Cost of 400 m2 wall painting = Rs. 25 × 400 = 10000

∴ Total cost (in Rs.) of whitewashing only all four walls of the room is Rs. 10000.

Given:

Normal Discount on selling price = 35%

Successive discount on selling price = 20% & 15%

Difference in amount of normal and successive discount = Rs.504

Formula Used:

Successive Discount formula = D₁ + D₂ - (D₁ × D₂)/100

Selling price formula = {MP × (100-D)}/100

Calculation:

Substituting the values in formula

Successive discount = 20 + 15 - (20 × 15)/100

 ⇒ 32%

Normal discount = 35%

 Difference in discount % = Difference in discount amount

35% - 32% = Rs.504

3% =504

⇒ 1% = 168

∴ 100% = Rs.16800

Given:

A takes 1  hour to fill tank.

A with leakage takes 4/3 hours

Concept used:

we will use fraction method to find per minute work

A work per minute is 1/1

A and leakage work per minute is {1/(4/3)} = 3/4

Calculation:

we subtract A and leakage form A

⇒ 1 - 3/4 =(4 -3)/4 =1/4

leakage per minute work is 1/4

∴ A full tank will be emptied by leakage in 4 hours.

An alternate method is by LCM 

Let the leakage be L

             Time   Total work(LCM of time)  Efficiency(total work/ time)                       

      A       1                                               4               

                                     4                                                    

    A - L    3/4                                           3

L efficiency = 4 - 3 =1

Times taken by L = Total work/Efficiency

⇒ 4/1 = 4 hours

∴ A full tank will be emptied by leakage in 4 hours.

Given:

A and B are two towers having the same base

The angle of elevation of tops of A and B from point c = 30 ° and 45 °

According to the question,

Midpoint to the line joining the feet bc = cd

Tan 30° ⇒$\frac{{height;(ab)}}{{base(bc)}}; = \frac{1}{{\sqrt 3 }}$         ---------------(i)

Tan 45° ⇒ $\frac{{height(de);}}{{base(cd)}}; = 1$           -----------------(ii)

From the equation (i) & (ii)

Bc = cd = de = $\sqrt 3$

⇒ ab : de = $1:\sqrt 3$

∴ The ratio of the heights of A : B =${\bf{1}}:\sqrt {\bf{3}}$

Given:

Ratio of total surface area and volume of a sphere = 2 ∶ 7

Formula used:

Total surface area of sphere = 4πr²

Volume of a sphere = (4/3)πr³

Calculation:

According to the question,

(4πr²)/(4πr3/3) = 2/7

⇒ 3/r = 2/7

⇒ r = 21/2 = 10.5cm

∴ The radius of sphere is 10.5cm