West Bengal Police SI (Prelims) Official Paper (Held On : 15 Dec 2019) (Previous Year Paper)

The correct answer is Plant and Animal fossils.

 

Important Points

• Paleontology is the study of past life forms using fossils.
• An example of paleontology is the branch of geology that studies dinosaurs.
• The study of the forms of life existing in prehistoric or geologic times, as represented by the fossils of plants, animals, and other organisms.

​

Additional Information

• Volcanology, also spelled vulcanology, the discipline of the geologic sciences that is concerned with all aspects of volcanic phenomena.
• Volcanology, A geologist uses a rock hammer to sample active pahoehoe lava for geochemical analysis on the Kilauea volcano, Hawaii.
• Meteorology is the study of the atmosphere, atmospheric phenomena, and atmospheric effects on our weather.
• The atmosphere is the gaseous layer of the physical environment that surrounds a planet. ... Meteorology is a subdiscipline of the atmospheric sciences, a term that covers all studies of the atmosphere.
• ​Petrology is the study of rocks - igneous, metamorphic, and sedimentary - and the processes that form and transform them.
• Mineralogy is the study of the chemistry, crystal structure, and physical properties of the mineral constituents of rocks.

The correct answer is Principle of Inertia. 

Important Points

• Newton's first law of motion states that an object at rest remains at rest and an object in motion remains in motion with the same velocity unless acted upon by what we call an unbalanced force which is also called the Principle of Inertia.
• The force of gravity pulling down is balanced by the force of my kitchen table pushing up on my cup of coffee.
• A stationary object with no outside force will not move.
• With no outside forces, a moving object will not stop.
• An astronaut who has their screwdriver knocked into space will see the screwdriver continue on at the same speed and direction forever.
• An object at rest stays at rest.

Additional Information

• Newton's Second Law of motion also called Law of Force and Acceleration states that the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force. ie., F=ma where F is the force applied, m is the mass of the body, and a, the acceleration produced.
• Newton's third law states that every action has an equal and opposite reaction. 
• An example of Newton's third law of motion is when you jump your legs apply the force to the ground and the ground also applies the opposite force to your legs which propels you into the air.

The correct answer is 13^th April 1919.

Important Points

• Jallianwala Bagh Massacre, also called the Massacre of Amritsar, incident on April 13, 1919.
• In which British troops fired on a large crowd of unarmed Indians in an open space known as the Jallianwala Bagh in Amritsar in the Punjab region (now in Punjab state) of India.
• Under the Command of British Commander General Dyer, Killing several hundred people and wounding many hundreds more were taken into account.
• It marked a turning point in India’s modern history, in that it left a permanent scar on Indo-British relations.​
• It was the prelude to Mohandas (Mahatma) Gandhi’s full commitment to the cause of Indian nationalism and independence from Britain.

The correct answer is ​Members of Parliament and members of Sate Legislative Assemblies.

Key Points

• ​Under Article 324 of the Constitution of India, the authority to conduct elections to the Office of President is vested in the Election Commission of India.
• The President of India is elected by the electoral college which consists of Elected members of both the houses of parliament.
• The elected members of the Legislative Assemblies of Delhi and Pondicherry have been authorized to be the part of Electoral College by the 70^th Amendment of 1992.

Important Points

• Under Article 61 of the constitution, the president may also be removed before the expiry of the term through impeachment for violating the Constitution of India by the Parliament of India.
• The process may start in either of the two houses of the parliament.
• The Powers of the President-​
• Serve as commander in chief of the armed forces.
• Commission officers of the armed forces.
• Grant reprieves and pardons for federal offenses (except impeachment)
• Convene Congress in special sessions.
• Receive ambassadors.
• Take care that the laws be faithfully executed.
• Wield the "executive power"

The correct answer is Mahesh Das.

 

Important Points

• Birbal originally called Mahesh Das born in (1528 –1586), or Raja Birbal, was a Hindu advisor and main commander of the army in the court of the Mughal emperor, Akbar.
• He is mostly known in the Indian subcontinent for the folk tales which focus on his wit.
• Men went on to constitute the nine courtiers, also known as 'Navratnas', of Akbar's kingdom**.**
• The navratnas are Abul Fazl, Abdul Rahim Khan-I-Khana, Birbal, Mulla Do-Piyaza,  Faizi, Raja Man Singh, Raja Todar Mal, Fakir Aziao-Din, and Tansen.

The correct answer is ​all the four valence electrons are bonded to each carbon atom by covalent bonds.

 

Important Points

• In diamond, each carbon atom is sp3 hybridized and linked to four other carbon atoms tetrahedrally by covalent bonds.
• As the atoms are held firmly by covalent bonds, therefore, diamond is the hardest substance.
• This results in a very big three-dimensional polymeric structure in which the C - C distance is 154 pm and the bond angle is 109.5°.
• Owing to very strong covalent bonds by which atoms are held together.
• The outermost shell of each carbon atom has four electrons. In diamond, these electrons are shared with four other carbon atoms to form very strong chemical bonds resulting in an extremely rigid tetrahedral crystal. It is this simple, tightly-bonded arrangement that makes diamond one of the hardest substances on the earth.
• Hardness.
• Low coefficient of friction.
• High thermal conductivity.
• High electrical resistivity.
• Low thermal expansion coefficient.
• High strength.
• Broad optical transparency from ultraviolet to infrared.

The correct answer is 60 minutes

 

Key Points

• The total time allocated for Zero hours has no maximum limit on the number of matters that can be raised on any given day.
• The session would be completed before 1 pm.
• The Zero Hour starts immediately after the question hour and lasts until the agenda for the day (ie, regular business of the House) is taken up.
• In other words, the time gap between the question hour** and the agenda is known as zero hours.**
• As the 9^th Lok Sabha Speaker, Rabi Ray introduced certain changes in the proceedings of the House to create more opportunities for the members to raise matters of urgent public importance.
• The Zero hour starts immediately after the question hour and lasts until the agenda for the day is taken up.
• In other words, the time gap between the question hour and the agenda is known as Zero hours.
• Zero hour usually starts at 12 noon, whereby MPs can raise their questions about issues of urgent public importance.
• Zero hours is not mentioned in the rules of procedure.
• It is an Indian innovation in the field of parliamentary procedures and has been in existence since 1962.
• It is an informal device available to the members of the parliament to raise matters without any prior notice.

The correct answer is Service Sector.

 

Important Points

• The service sector, also known as the tertiary sector, is the third tier in the three-sector economy.
• Instead of product production, this sector produces services maintenance and repairs, training, or consulting.
• Examples of service sector jobs include housekeeping, tours, nursing, and teaching.
• The services sector is the largest sector in India.
• The services sector accounts for 53.66% of the total India's GVA of Rs. 137.51 lakh crore.
• The industrial sector is at the second spot and contributing around 31% of the Indian GDP.
• The service sector makes an important contribution to GDP in most countries, providing jobs, inputs, and public services for the economy.
• Trade-in services can improve economic performance and provide a range of traditional and new export opportunities.
• The MSME sector is and regarded as the backbone of the Indian economy.
• It churns out over 6000 products that are highly sought after across the global marketplaces.
• It employs 40% of the country's workforce, next only to the agricultural sector.

 

​

Additional Information

• The Agriculture sectors comprise establishments primarily engaged in growing crops, raising animals, and harvesting fish and other animals from a farm, ranch, or their natural habitats.
• Agriculture is the most important sector of the Indian Economy.18 percent of India's gross domestic product (GDP) and provides employment to 50% of the countries workforce. India is the world's largest producer of pulses, rice, wheat, spices, and spice products.
• The Manufacturing sector comprises establishments engaged in the mechanical, physical, or chemical transformation of materials, substances, or components into new products.

The correct answer is Darwin.

• The Law of Natural Selection was given by Charles Darwin in the Theory of Evolution in its book " On the Origin of Species" in 1859.
• It is the process by which organisms change over time as a result of the change in heritable physical or behavioral traits.
• Changes that allow an organism to better adapt to its environment will help to survive and have more offspring.

 

 

Additional Information

The correct answer is Insulin.

Important Points

The correct answer is Methane.

Important Points

• Biogas is consists of Methane**, Hydrogen, Carbon dioxide.**
• Methane is the Main Constituent of Gobar gas or Biogas.
• Biogas is a type of biofuel that is naturally produced from the decomposition of organic waste.
• When organic matter, such as food scraps and animal waste, breaks down in an anaerobic environment, they release a blend of gases, primarily methane and carbon dioxide.
• Because this decomposition happens in an anaerobic environment, the process of producing biogas is also known as anaerobic digestion.
• Anaerobic digestion is a natural form of waste-to-energy that uses the process of fermentation to breakdown organic matter.
• Animal manure, food scraps, wastewater, and sewage are all examples of organic matter that can produce biogas by anaerobic digestion.
• Due to the high content of Methane in biogas ( 50-75%), biogas is flammable, and therefore produces a deep blue flame, and can be used as an energy source.
• Biogas also called an environmentally friendly energy source.

The correct answer is Jawaharlal Nehru.

Key Points

• Letters from a Father to his Daughter is a collection of letters written by Jawaharlal Nehru to his daughter Indira Priyadarshini, originally published in 1929 by Allahabad law journal press at Nehru's request and consisting of only the 30 letters sent in the summer of 1928 when Indira was 10 years old.

 

Important Points

The correct answer is the Mediterranean Sea.

Important Points

• The Strait of Gibraltar is a narrow waterway separating the Atlantic Ocean (bottom left) from **the Mediterranean Sea (**top right).
• This 13-kilometer-wide waterway also separates Europe and Africa, with Spain and Gibraltar on the left and Morocco on the right.
• The Red Sea narrow strip of water extending southeastward from Suez, Egypt, for about 1,200 miles to the Bab-al-Mandeb Strait, which connects with the Gulf of Aden and thence with the Arabian Sea.
• The Atlantic Ocean, a body of Saltwater covering approximately one-fifth of the Earth's Surface and separating the continents of Europe and Africa to the east from those of North and South America to the West. It is the Second in Size to the Pacific Ocean.
• The Persian Gulf also called as Arabian Gulf, shallow marginal sea of the Indian Ocean that lies between the Arabian Peninsula and southwestern Iran.

The correct answer is France.

Hint

• FIFA stands for Federation Internationale de Football Association.
• The motto of FIFA is For the Game. For the World.
• France won the match after beating Croatia by 4-2 in Russia's FIFA world cup the Second time.
• FIFA is a non-profit organization that describes itself as an international governing body of association football and beach soccer.
• It is founded in 1904, Paris, France.
• It is the highest governing body of football.
• It is headquartered in Zurich, Switzerland.

Important Points

• FIFA WC 2022 Winner is Argentina, and it was held in Qatar.
• Argentina were crowned the champions after winning the final against the title holder France 4–2 on penalties following a 3–3 draw after extra time.

The correct answer is the State Bank of India.

Important Points

Given:

Father = 4 × daughter

Five years later

Father = 3 × daughter.

Calculation:

Let the present age of daughter be x years.

So, the father's present age is 4x years

After 5 years

⇒ 4x + 5 = 3 × (x + 5)

⇒ 4x + 5 = 3x + 15

⇒ x = 10

Present age of daughter is 10 years

Father's present age is 4 × 10 = 40 years

Ratio asked after 10 years

Age after 10 years will be 

⇒ Father : Daughter = 50 : 20

⇒ Father : Daughter = 5 : 2

∴ Father's age will be 2.5 times of daughter age after 10 years.

⇒ Father : Daughter = 4 : 1

⇒ (Father + 5)/(Daughter + 5) = 3/1

⇒ (4x + 5)/(x + 5) =  3/1

⇒ 4x + 5 = 3x + 15

⇒ x = 10

Father = 40 years and daughter = 10 years

Ratio after 10 years will be

⇒ 50 : 20 = 5 : 2

∴ Father's age will be 2.5 times of daughter age after 10 years.

Shortcut Trick

In the given ratio we need to make the difference of ratio equal

After equating difference between the father's age is equal to given years

 so 1unit = 5 years

In the question asked 5 years more later so wee add 1 unit into the ratio

Final ratio we will get Father : Daughter = 10 : 4

∴ Father's age will be 2.5 times of daughter age after 10 years.

Given:

Product of digits of a two-digit number is 8

Adding 18 reverse the number

Calculation:

Let digit on number be a and b

So, the number is a × 10 + b

According to question

⇒ a × 10 + b + 18 = b × 10 + a

⇒ 10a – a + b – 10b = 18

⇒ 9a – 9b =18 

⇒ a – b = 2

Now we look at the factors of 8 with a difference of 2

⇒ 4 × 2 = 8

So, a = 2 and b = 

number will be 2 × 10 + 4 = 24

∴ The number is 24

Shortcut Trick

Concept used:

By reversing a two-digit number the difference between the number and reversed number is multiple of 9 and difference of two-digit.

⇒ 9 × 2 = 18

So, the difference of two-digit of the number is 2

Now, check for the factors of 8 with the difference of 2

⇒ 4 × 2 = 8

So, the digits of the number will be 2 and 4

∴ The number is 24.

Important Points

There are two combinations of 2 and 4. 24 and 42 but in the question given that by adding 18 number the number reversed.

So, the number has to be 24.

Given:

0.002 × 0.5

Calculation:

⇒ (2/1000) × (5/10)

⇒ (10/10000)

⇒ (1/1000) = 0.001

∴ The value of 0.002 × 0.5 is 0.001.

Given:

 52% of X : 30% of Y is 12 : 5

X - Y = 50

Calculation:

First, we have to find X and Y

⇒ (52%X)/(30%Y) = 12/5

⇒ X/Y = (12 × 30)/(5 × 52)

⇒ X/Y = 360/260

⇒ X/Y = 18/13

Now, X - Y = 50

⇒ 18a - 13a = 50

⇒ 5a = 50

⇒ a = 10

 So, X = 180 and Y = 130

⇒ 2X + Y

⇒ 2 × 180 + 130

⇒ 490

∴ Value of 2X + Y is 490.

Given:

Amit is 6 years older than Soma.

Bunny's age is 1/3^rd of Soma's age.

Sum of the present age of Amit and Bunny is 54 years.

Calculation:

Let the present age of Soma be x years

Let the age of Amit and Bunny be A and B respectively.

So, A = x + 6

B = x/3

A + B = 54

⇒ x + 6 + x/3 = 54

⇒ 4x/3 = 54 - 6

⇒ x = 48 × (3/4)

⇒ x = 36 years

Soma's present age is 36 years

Bunny's present age is 12 years.

Soma's age when Bunny was born = 36 - 12

⇒ 24 years

∴ Age of Soma when Bunny was born was 24 years

Given:

Sum of 3 numbers = 136

First number : Second number = 2 : 3

Second number : Third number = 5 : 3

Concept used:

If the ratio of A : B and B : C is given 

Then, to find ratio of A : B : C

To make ratio of B equal we have to apply the formula below.

A : B₁ and B₂ : C

A : B : C = A × B₂ : B₁ × B₂ : B₂ × C

Calculation:

Let the first, second and third numbers be A,B and C respectively.

⇒ A + B + C = 136

A : B = 2 : 3

B : C = 5 : 3

⇒ A : B : C = 10 : 15 : 9

⇒ A + B + C = 10x + 15x + 9x

⇒ A + B + C = 34x

⇒ 34x = 136

⇒ x = 4

⇒ B = 15x 

⇒ B = 60

∴ The second number is 60.

Given:

15 men complete a piece of work in 21 × 8 hours

work done by 3 women = work done by 2 men

Formula used:

Total work = Efficiency × time

If the total work is constant. then,

Efficiency ∝ TIme

By reversing the time we get ratio of efficiency.

Calculation:

First we need to find efficiency

work done by 3 women = work done by 2 men

⇒ Women : Men = 2 : 3

Men total efficiency = 3 × 15 = 45

Total work = 45 × 21 × 8

Time taken by 21 women working 6 hours a day

Efficiency of 21 women = 21 × 6 × 2

Time = Total work/Efficiency

⇒ (45 × 21 × 8)/(21 × 6 × 2)

⇒ 30 days

∴ 21 women woking 6 hours a day will take 30 days to complete a peice of work.

Given:

Length of the train = 100 meters

Speed of the train = 36 km/hr

Formula used:

Speed = Distance/Time

To convert km/hr into m/s multiply by 5/18

Calculation:

First, convert km/hr into m/s

⇒ 36 × (5/18) = 10 m/s

Speed = Distance/Time

⇒ 10 = 100/time

⇒ time = 10 seconds

∴ The time taken by the train to pass the telegraph post is 10 seconds.

Given:

'A' completes a piece of work = 12 days

A and B together complete a piece of work = 8 days

Concept used:

If a person does work in 'n' days then in one day a person does 1/n part of the total work.

Calculation:

One day work by A + one day work by B = one day work by both A and B

1/A + 1/B = 1/(A +B)

⇒ 1/12 + 1/B = 1/8

⇒ 1/B = (1/8) –(1/12)

⇒ 1/B = (3 –2)/24

⇒ 1/B = 1/24

⇒ B = 24 

∴ 'B' can  alone complete the same piece of work in 24 days.

Given:

The sum of two digits of a two digits number = 12

And the difference between the two digits of the two digits number = 6

Calculation:

First condition:

Let us assume numbers be xy. and we assume x is greater than y

According to question;

x + y = 12       ----(i)

And x – y = 6      ----(ii)

After adding equation (i) and (ii), we get,

2 × x = 12 + 6

⇒ 2x = 18

⇒ x = 18/2

⇒ x = 9

Put x = 9 in equation (i) we get,

9 + y = 12

⇒ y = 12 – 9

⇒ y = 3

Number xy that is 93.

Second condition:

Let us assume numbers be xy. and we assume y is greater than x

According to question;

x + y = 12       ----(i)

and y – x = 6      ----(ii)

After adding equation (i) and (ii), we get,

2 × y = 12 + 6

⇒ 2y = 18

⇒ y = 18/2

⇒ y = 9

Put y = 9 in equation (i) we get,

9 + x = 12

⇒ x = 12 – 9

⇒ x = 3

Number xy that is 39.

The above two values will be possible but in the option 93 is only given so we choose the two-digit number as 93.

∴ The two-digit number is 93.

Given:

Five bells commence tolling together and toll at intervals of 9, 6, 4, 10 and 8 seconds respectively.

Concept used:

Least common multiplication 

Calculation:

A least common multiple of (9, 6, 4, 10 and 8)

We can write 9 = 3²

4 = 22 

6 = 2 × 3

8 = 23 

10 = 2 × 5

A least common multiple of (9, 6, 4, 10 and 8) = 23 × 3² × 5

⇒ 8 × 9 × 5

⇒ 360 sec

Bells ring together after every 360 sec 

Required number of times in 1 hour (60 × 60 seconds) = [(60 × 60)/360]

⇒ 10

But we have to add 1 because at starting all bells will be rung once a time after that the ring 10 times.

⇒ 10 + 1 

⇒ 11 times 

∴ The required number of times when they toll together is 11.

GIven:

In the 12^th innings, Sachin Tendulkar scores = 120 runs

Formula used:

Average = sum of all numbers/total number

Calculation:

Let Sachin Tendulkar, average scores in 11^th innings be x

Total runs in 11^th innings = 11 × x

⇒ 11x

After increasing the average by 5 runs, new average = x + 5

⇒ (Total runs in 11^th innings + runs in 12^th innings)/12 = x + 5

⇒ (11x + 120)/12 = x + 5

⇒ (11x + 120) = (x + 5) × 12

⇒ 11x + 120 = 12x + 60

⇒ 12x – 11x = 120 – 60

⇒ x = 60

New average = 60 + 5

⇒ 65

∴ The new average is 65.

Shortcut Trick

Actually after scoring 120 runs in 12^th innings the average increased by 5 runs.

then total increased runs = 12 × 5 = 60 runs

Now previous average should be 120 - 60

⇒ 60 runs

New average = 60 + increased average 

⇒ New average = 60 + 5

⇒ 65 runs

∴ The new average is 65.

Given:

The number of revolutions = 1000

And total cover distance = 440 m.

Formula used:

One revolution = total distance covered by wheel/the number of revolutions

Circumference of wheel = 2 × π × r = distance covered by a wheel in one revolution

Diameter of a wheel = 2 × r

Calculation:

Distance in one revolution = 440/1000

⇒ Distance in one revolution = 0.44 m

⇒ 2 × π × r = 0.44

⇒ r = 0.44/(2 × π), where π = 22/7

⇒ r = 0.07 m

Diameter = 2 × 0.07

⇒ Diameter = 0.14 m

∴ The diameter (in meter) of the wheel is 0.14 m.

The logic followed is:-

Carl Lewis, Usain Bolt, Ben Johnson are all sprinters.

Whereas,

Emil Jacktopek is long - distance runner.

Hence, the correct answer is "Emil Jacktopek".

The pattern followed here is:-

7² = 49

Similarly,

17² = 289

Hence, the correct answer is "289".

The given words when arranged as they appear in an English dictionary:-

2) Sanction

3) Sanctity

4) Sanskrit

1) Santorium

So, Santorium will appear fourth in the dictionary.

Hence, the correct answer is "Santorium".

Symbols used to draw the family tree:-

Drawing the family tree,

So, Gopal is Govind's father.

Hence, the correct answer is "Father".

According to the given information,

So, He is 4 feet from the point B.

Hence, the correct answer is "4 feet".

Symbols used to draw the family tree:-

Drawing the family tree,

So, Vinod and Vishal are cousins.

Hence, the correct answer is "Cousin".

As per the given information,

1. Sita is older than Swapna.

Sita > Swapna

2. Lavanya is older to Swapna but younger than Sita.

Sita > Lavanya > Swapna

3. Swapna is older to Hari.

Sita > Lavanya > Swapna > Hari

4. Varna is younger than both Hari and Swapna.

Sita > Lavanya > Swapna > Hari > Varna

So, the final arrangement is:

Sita > Lavanya > Swapna > Hari > Varna

So, the youngest is Varna.

Hence, the correct answer is "Varna".

The pattern followed is:-

Subtracting 4 from the place values of the letters.

For MEKLF,

For LLLJK,

Similarly, for IGHED,

Hence, the correct answer is "53410".

The logic followed is:-

They are cubes of even numbers.

2³ = 8

4³ = 64

6³ = 216

Similarly,

8³ = 512

Hence, the correct answer is "512".

The pattern given is as follows: 

1³ + 1 = 2

2³ + 2 = 10

33 + 3 = 30

43 + 4 = 68

53 + 5 = 130

63 + 6 = 222

Hence, the correct answer is "68".

In the given letter series:

N P K R M D C N M R K P Q K R N M R K R M K P R M.

We have to search for R which is immediately preceded by ‘M’ and immediately followed by 'K’.

There are two such arrangements that satisfy the above conditions.

N P K R M D C N M R K P Q K R N M R K R M K P R M.

Hence, the correct answer is "Two".

The logic follows here is:

(Sum of the digits of the first number) - (sum of the digits of the second number) = Third number.

i) 8 + 4 = 12

1 + 3 = 4

12 – 4 = 8

ii) 3 + 7 = 10

1 + 3 = 4

10 – 4 = 6

Similarly,

5 + 6 = 11

2 + 2 = 4

11 – 4 = 7 

Hence, the correct answer is "7".

The correct answer is Angstrom.

Important Points

The correct answer is Geneva.

• The International Labour Organization (ILO) is made to promote social justice and internationally recognized human and labour rights, pursuing its founding mission that labour peace is essential to prosperity.
• The Office employs some 2,700 officials from over 150 nations at its headquarters in Geneva, Switzerland.

Key Points

• The ILO was created in 1919, as part of the Treaty of Versailles that ended World War I, to reflect the belief that universal and lasting peace can be accomplished only if it is based on social justice.
• In 1946, the ILO is the specialized agency of the United Nations.
• Its motive and structure give an equal voice to workers, employers and governments providing a unique platform for promoting decent work for all women and men.

​ 

Additional Information

The correct answer is Dehradun. 

Key Points:

• The Forest Research Institute (FRI) is an institute of the Indian Council of Forestry Research and Education.
• It is a premier institution in the field of forestry research in India.
• It is located at Dehradun in Uttarakhand.
• In 1991, it was declared a deemed university by the University Grants Commission.
• The Forest Research Institute campus hosts the Indira Gandhi National Forest Academy (IGNFA), the staff college that trains officers selected for the Indian Forest Service (IFS).

The correct answer is Vitamin B.

Confusion Points

• Vitamin B (all Quantity) > Vitamin D

Important Points

• Cow's Milk is a rich source of high-quality protein, containing all essential amino acids.
• Whole milk is also a rich source of energy in the form of saturated fats, which can prevent muscle mass from being used for energy.
• Low-fat milk can provide the benefits of milk while supplying less fat.
• Cow milk is filled with calcium, vitamin D, phosphorus and magnesium
• Milk is a good source of thiamin, riboflavin, and vitamin B12.
• Milk contains small amounts of niacin, pantothenic acid, vitamin B6, vitamin C, and folate and is not considered a major source of these vitamins in the diet.
• Milk contains fat-soluble vitamins A, D, E, and K.

The correct answer is Weightlifting.

  

Key Points 

• Nameirakpam Kunjarani Devi is the most decorated Indian Sportswoman in Weightlifting, in the category of 48kg.
• She holds the rank of Commandant in the CRPF and also worked as nodal officer for the sports team in CRPF.
• She was also awarded Rajiv Gandhi Khel Ratna and Arjuna award for the year 2014.
• She was also the coach of the Indian Weightlifting in Common Wealth Games 2014 in Glasgow.

The correct answer is Direct and Progressive. 

Important Points

• Income tax is a Direct tax.
• Direct taxes are progressive, because it is possible to help more people who do not earn as much, and at the same time, mobilize resources from those who earn well. This is what makes them progressive.
• This is the tax that is levied on the annual income or the profits which are directly paid to the government.
• Everyone who earns any kind of income is liable to pay income tax.
• A progressive tax imposes a higher rate on the rich than on the poor. It's based on the taxpayer's income or wealth. It's done to help lower-income families pay for basics like shelter, food, and transportation.
• A progressive tax allows them to spend a larger share of their incomes on the cost of living expenses.
• Examples of progressive tax include investment income taxes, tax on interest earned, rental earnings, estate tax, and tax credits.

The correct answer is 7516.6 Kms.

 

Important Points

• India is one of the oldest civilizations in the world with a kaleidoscopic variety and rich cultural heritage.
• As the 7^th largest country in the world, India stands apart from the rest of Asia, marked off as it is by mountains and the sea, which give the country a distinct geographical entity.
• Bounded by the Great Himalayas in the north, it stretches southwards and at the Tropic of Cancer, tapers off into the Indian Ocean between the Bay of Bengal on the east and the Arabian Sea on the west.
• Lying entirely in the northern hemisphere, the mainland extends between latitudes 8° 4' and 37° 6' north, longitudes 68° 7' and 97° 25' east and measures about 3,214 km from north to south between the extreme latitudes and about 2,933 km from east to west between the extreme longitudes.
• It has a land frontier of about 15,200 km.
• The total length of the coastline of the mainland, Lakshadweep Islands, and Andaman & Nicobar Islands are 7,516.6 km.

The correct answer is  Rhizobium.

• Rhizobium is of great ecological and agronomic importance, due to its ability to fix large amounts of atmospheric nitrogen.
• This is why Rhizobium is called a Nitrogen Fixation agent.

 

Important Points

The correct answer is Chlorophyll.

Key Points

• Chlorophyll is a pigment that gives plants their green color, and it helps plants create their own food through Photosynthesis.
• There are many different types of pigments in nature, but chlorophyll is unique in its ability to enable plants to absorb the energy they need to build tissues.
• Chlorophyll is located in a plant’s chloroplast which are tiny structures in a plant’s cells, where photosynthesis takes place.
• Chlorophyll’s job in a plant is to absorb light—usually sunlight. The plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose, a type of sugar.
• Plant uses glucose together with nutrients taken from the soil to make new leaves and other plant parts.
• The process of photosynthesis produces oxygen, which is released by the plant into the air.
• Chlorophyll gives plants their green color because it does not absorb the green wavelengths of white light. That particular light wavelength is reflected from the plant, so it appears green.

The correct answer is the Atacama Desert.

• Chile's Atacama Desert, the driest nonpolar desert on Earth, stretches across a roughly 600-mile tract of land wedged between the coastal Cordillera de la Costa mountain range and the Andes Mountains.
• The Atacama is stuffed in the shadow of the snow-capped Andes Mountains, which block rainfall from the east. To the west, the upwelling of cold water from deep in the Pacific Ocean promotes atmospheric conditions that hamper the evaporation of seawater and prevent the formation of clouds and rain.
• Temperature is comparatively mild throughout the year.
• The average temperature in the desert is about 18 degrees C.

 

​

Important Points​

The correct answer is Force.

Key Points

• A force is an effort that changes the state of an object at rest or at motion.
• It can change the Velocity and direction of an object.
• It also changes the shape of an object.
• It has a magnitude and direction so we called it vector Quantity.
• S.I. The unit of Force is Newton.​

Important Points

The correct answer is Balaji Bajirao.

Key Points

• The Peshwa of the Maratha Empire at the time of the Third Battle of Panipat (1761) was Balaji Bajirao alias Nanasaheb.
• Balaji Bajirao alias Nanasaheb was the son of Peshawa Bajirao I.
• Balaji Bajirao was the Peshawa from 1740 to 1761.
• He died on 23^rd June 1761 due to an illness that was caused by the defeat in the 3^rd Battle of Panipat.
• The Third Battle of Panipat took place on 14 January 1761, at Panipat, about 60 miles (95.5 km) north of Delhi between a northern expeditionary force of the Maratha Empire and the King of Afghanistan, Ahmad Shah Durrani with two Indian Muslim allies— the Rohilla Afghans of the Doab, and Shuja-ud-Daula, the Nawab of Oudh.
• The result of the battle was the halting of further Maratha advances in the north, and a destabilization of their territories, for roughly 10 years.

The correct answer is West Bengal.

Important Points

• Jaldapara National Park is a national park situated at the foothills of Eastern Himalayas in Alipurduar Sub-Division of Jalpaiguri district in West Bengal and on the bank of river Torsa.
• The river Torsha flows through this rain forest sanctuary and has an area of 141 sq.Km and altitude of 61 m.
• Jaldapara, the vast grassland with patches of riverine forests was declared a sanctuary in 1941 for protection of the great variety of flora and fauna, particularly the one-horned rhinoceros, an animal threatened with extinction.
• The Jaldapara Sanctuary covers 216 sq Km, is a mosaic of woods, grasslands, perennial streams, sandy river banks, and extensive belts of tall grass.
• It contains a great diversity of flora and fauna of the mixed deciduous forest, grasslands, and river banks.
• The Malangi River also flows nearby from east to west.
• Drained by rivers Torsa, Malangi, Hollong, Chirakhawa, Kalijhora, Sissamara, Bhaluka, and Buri Torsa, the Sanctuary provides extensive grassland which is the last refuge to a wide variety of mammals, amphibians, reptiles, and birds.

The correct answer is the ultraviolet rays convert skin oil into vitamin-D.

 

Important Points

• Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and multiple other biological effects.
• In humans, the most important compounds in this group are vitamin D3 (also known as cholecalciferol) and vitamin D2 (ergocalciferol).
• Cholecalciferol and ergocalciferol can be ingested from the diet and from supplements. Only a few foods contain vitamin D.
• The major natural source of the vitamin is the synthesis of cholecalciferol in the skin from cholesterol through a chemical reaction that is dependent on sun exposure (specifically UVB radiation).
• Dietary recommendations typically assume that all of a person's vitamin D is taken by mouth, as sun exposure in the population is variable and recommendations about the amount of sun exposure that is safe are uncertain in view of the skin cancer risk.

The correct answer is Hooghly​.

• Raja Ram Mohan Roy was born on May 22, 1772, in village Radhanagar in the District of Hooghly in Bengal.
• His father Ramkanto Roy, was a Vaishnavite, while his mother, Tarini, was from a Shakta background.

 

Important Points

• Raja Ram Mohan Roy was sent to Patna for higher studies. By the age of fifteen, Raja Rammohun Roy had learned Bangla, Persian, Arabic, and Sanskrit
• Raja Ram Mohan Roy was against idol worship and orthodox Hindu rituals. He stood firmly against all sorts of social bigotry, conservatism, and superstitions. But his father was an orthodox Hindu Brahmin.
• He was the founder of the Brahmo Samaj, one of the first Indian socio-religious reform movements.
• Raja Rammohan Roy was a great scholar and an independent thinker. He advocated the study of English, Science, Western Medicine, and Technology. He was given the title 'Raja' by the Mughal Emperor.
• In 1814, Raja Ram Mohan Roy formed Atmiya Sabha. Atmiya Sabha tried to initiate social and religious reforms in society.
• Raja Ram Mohan Roy campaigned for rights for women, including the right for widows to remarry, and the right for women to hold property. He actively opposed the Sati system and the practice of polygamy.
• He also supported education, particularly the education of women. He believed that English-language education was superior to the traditional Indian education system, and he opposed the use of government funds to support schools teaching Sanskrit.

In 1822, he founded a school based on English education.​

In 1831 Ram Mohan Roy traveled to the United Kingdom as an ambassador of the Mughal emperor to plead for his pension and allowances. ​

Raja Ram Mohan Roy passed away on September 27, 1833, at Stapleton near Bristol due to meningitis.

The correct answer is Myanmar.

Key Points

• The first summit of SAARC was held in Dhaka, Bangladesh on 7–8 December 1985.
• It was attended by Bangladesh, Maldives, Pakistan, Sri Lanka, Bhutan Nepal, and India.

 

Important Points

• The South Asian Association for Regional Cooperation (SAARC) was established with the signing of the SAARC Charter in Dhaka on 8 December 1985.
• The SAARC Secretariat was established in Kathmandu on 16 January 1987.
• SAARC comprises of eight-member States:
• Afghanistan
• Bangladesh
• Bhutan
• India
• Maldives
• Nepal
• Pakistan
• Sri Lanka

 

Additional Information

• You can remember the names of SAARC Countries using the mnemonic
• "MBBS PAIN" for Maldives, Bhutan, Bangladesh, Sri Lanka, Pakistan, Afghanistan, India, Nepal.

Given:

Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12 seconds respectively.

Concept used:

Least common multiplication 

Calculation:

A least common multiple of (2, 4, 6, 8, 10 and 12)

we can write 2 = 1 × 2

4 = 2² 

6 = 2 × 3

8 = 2³ 

10 = 2 × 5

12 = 2² × 3

A least common multiple of (2, 4, 6, 8, 10 and 12) = 2³ × 3 × 5

⇒ 8 × 3 × 5

⇒ 120 sec

Bells ring together after every 120 sec 

Required number of times in 30 minutes (30 × 60 seconds ) = [(30 × 60)/120]

⇒ 15

But we have to add 1 because at starting all bells will be rung once a time after that they ring 15 times.

⇒ 15 + 1

⇒ 16 times 

∴ The required number of times when they toll together is 16.

Given:

The difference between the areas of a rectangle and square = 35 cm

Formula used:

Area of rectangle = length × breadth

Area of square = (side)²

Calculation:

Let the rectangle length and breadth be 'l' and 'b' respectively and the side of the square be 'a'

The length of a rectangle(l) = [(100 + 50)/100] × a

⇒ [150/100] × a

⇒ 1.5a

The breadth of a rectangle(b) = [(100 – 10)/100] × a

⇒ [90/100] × a

⇒ 0.9a

The difference between the areas of a rectangle and square = 35 cm

⇒ length × breadth – (side)2 = 35

⇒ 1.5a × 0.9a – a² = 35

⇒ 1.35 × a2 – a² = 35

⇒ 0.35 × a² = 35

⇒ a2 = 35/0.35

⇒ a2 = 100

⇒ a = 10 cm

The length of a rectangle = 1.5a

⇒ 1.5 × 10

⇒ 15 cm

The breadth of a rectangle = 0.9a

⇒ 0.9 × 10

⇒ 9 cm

The area of a rectangle = 15 × 9

⇒ 135 cm² 

∴ The area of a rectangle is 135 cm2.

Given:

Average of speed during uphill (S₁) = 24 kmph

Average of speed during down (S₂) = 30 kmph

Formula used:

Average speed = (2 × S1 × S2)/(S1 + S2)

Calculation:

Average speed = (2 × 24 × 30)/(24 + 30)

⇒ 1440/54

⇒ 26.66 kmph

Hence, The average speed of the entire journey is 26.66 kmph.

Given:

The average weight of a group of 75 girls = 47 kg

False reading, the weight of a girl = 45 kg

and actual reading of the weight of a girl = 25 kg

Formula used:

The average weight of persons = the total weight of persons/the number of persons

and the total weight of persons = average weight of persons × the number of persons

Calculation:

Wrong average weight = 47 kg

Total wrong weight = 47 × 75

⇒ total wrong weight = 3525 kg

Now the correct weight of 74 persons = 3525 –45

⇒ 3480 kg

Now total correct weight after including the correct weight of a girl = 3480 + 25

⇒ 3505 kg

The actual average weight of the group of 75 girls = 3505/75

⇒ 46.733 kg

∴ The actual average weight of the group of 75 girls is 46.73 kg.

Using weighted average method:

If the weight was considered 45 kg then the average was 47 kg

but instead of 45 kg, we have to take 25 kg as actual weight

so extra weight= 45-25 =20 kg

These 20 kgs need to be distributed among all and the result should be subtracted from the previous average.

so extra average weight = 20/75

⇒ 0.266 kg

Now an actual average weight = 47 - 0.266

⇒ 46.733 kg   

∴ The actual average weight of the group of 75 girls is 46.73 kg.

Given:

the number of men(M₁) = 550

food last for days(D₁) = 28 days

Concept:

total work before and after joining the men will be the same.

Formula used:

M₁ × D₁= M₂ × D₂

where M and D represent the number of men and days respectively.

Calculation:

Let the same amount of food be enough for D2 days

Now men(M₂) = 550 + 150

⇒ M₂ = 700

M1 × D1= M2 × D2

550 × 28 = 700 × D2

⇒ D2 = (550 × 28)/700

⇒ D2 = 15400/700

⇒ D2 = 22 days

Hence, the same amount of food will be enough for 22 days.

The logic follows here is:

The numbers here are in the alternate of square and cubes of the number in increasing order.

1² = 1

2³ = 8

3² = 9 

4³ = 64 

5² = 25 

6³ = 216  

7² = 49

Hence, the correct answer is "216".

The logic followed is:

 

All except India are islands, while India is a peninsula.

Hence, the correct answer is "India".

Additional Information

• Longest island - Greenland
• Largest island in a lake - Manitoulin Island
• Largest island in a river - Majuli
• Largest island in a freshwater - Marajó
• Largest uninhabited island - Devon island
• Largest Peninsulas of World: Arabian Peninsula
• Second Largest Peninsula of World: Indian (Deccan) Peninsula
• Third Largest Peninsula of World: Indo-China Peninsula

​

About Japan:

• Japan is an Island Country that is located in the North-west Pacific Ocean in East Asia. It is one of the Most Densely Populated, Urbanized, and Eleventh-Most populous Countries in the world.
• It is bordered by the Sea of Okhotsk in the north to the East China Sea, Taiwan in the south, and the Sea of Japan to the west. It comprises an Archipelago of 6,852 Islands.
• Japan is part of the "Pacific Ring of Fire".

 

Five girls M.N, O, P and Q are standing in a row facing north.

i) N is on the left of Q but is on the right of M.

ii) P is on the right of Q.

iii) P is on the left of O (According to this statement is clear that to sit P on the left of O, O must be sitting on the extreme right).

According to the arrangement, O is sitting on the extreme right.

Hence, the correct answer is "O".

Decoding the given information,

After replacing the signs from left to right and using the BODMAS rule,

8 ÷ 2 + 6 × 3 - 5 = ?

4 + 6 × 3 - 5 = ?

4 + 18 - 5 = ?

22 - 5 = ?

? = 17

Hence, the correct answer is "17".

The pattern follows here is:

Hence, the correct answer is "65".

The correct answer is the North Atlantic Treaty Organisation.

Key Points

• NATO: North Atlantic Treaty Organization.
• Headquarters: Brussels, Belgium.
• This organization is an alliance of 32 independent member countries.
• It was established at the signing of the North Atlantic Treaty on 4 April 1949.

Important Points

• Sweden is the newest member of NATO.

Additional Information

• The fundamental goal of this organization is to safeguard the Allies’ freedom and security by political and military means.
• It enables members to consult and cooperate on defense and security-related issues to solve problems, build trust and, in the long run, prevent conflict.
• Article 5 states that an attack against one Ally is an attack against all. This article was invoked when Bin Laden attacked the World Trade Centre in September 2001.
• Chairman of the NATO Military Committee: Air Chief Marshal Stuart Peach, Royal Air Force.
• Secretary-General: Jens Stoltenberg.

The correct answer is Coach.

Key Points

• Dronacharya award is given by the Ministry of Youth Affairs and Sports, Government of India, for excellence in sports coaching.
• The award is known as after Drona, often referred to as "Dronacharya" or "Guru Drona", a personality from the Sanskrit epic Mahabharata of ancient India.
• The  Dronacharya award contains a medallion, a certificate, and a money prize of Rs 15 lakh(lifetime) and 10 Lakh (regular).

Additional Information

• Major Dhyan Chand Khel Ratna Award:
• It is that the highest sporting award given by the Ministry of Youth Affairs and Sports for the spectacular and top performance within the field of sports by a sportsperson.
• This, award contains a medallion, a certificate, and a money prize of Rs 25 lakh.
• Arjuna Awards:
• This award is given by the Ministry of Youth Affairs and Sports, Government of India to acknowledge outstanding action in National sports.
• Instituted in 1961, the award carries a money prize of Rs 15 Lakh, a bronze sculpture of Arjuna, and a scroll.

The correct answer is Betwa in Uttar Pradesh.

Key Points

• The Matatila Dam is situated in the district of Lalitpur, Uttar Pradesh. It was built in 1958 on the Betwa River.
• It is located 93 km away from Deogarh, this earthen dam is 35 m high. The catchment area is around 20 km² and a maximum storage capacity of 1132 million cubic metres.

Additional Information 

• The Betwa river originates from Vindhya Range in the Madhya Pradesh. It is a length of 590 km.
• The confluence of the Betwa and the Yamuna rivers is Hamirpur district in Uttar Pradesh state.

The correct answer is 35:1.

Key Points

• The student-teacher ratio at the upper primary level in schools under the Right to Education (RTE) Act should be 35:1.
• Every child of the age of six to fourteen years shall have a right to free and compulsory education in a neighborhood school till completion of elementary education.
• Where a child above six years of age has not been admitted in any school or though admitted, could not complete his or her elementary education, then, he or she shall be admitted in a class appropriate to his or her age, no child shall be liable to pay any kind of fee or charges or expenses which may prevent him or her from pursuing and completing the elementary education.

​​

Additional Information

• Right of Children to Free and Compulsory Education Act, 2009
• The Right of Children to Free and Compulsory Education Act or Right to Education Act (RTE) is an Act of the Parliament of India enacted on 4 August 2009.
• It describes the modalities of the importance of free and compulsory education for children between the age of 6 to 14 years in India under Article 21A of the Indian Constitution.
• India became one of 135 countries to make education a fundamental right of every child when the act came into force on 1 April 2010.
• The title of the RTE Act incorporates the words ‘free and compulsory’.
• ‘Free education’ means that no child, other than a child who has been admitted by his or her parents to a school which is not supported by the appropriate Government, shall be liable to pay any kind of fee or charges or expenses which may prevent him or her from pursuing and completing elementary education.
• ‘Compulsory education’ casts an obligation on the appropriate Government and local authorities to provide and ensure admission, attendance, and completion of elementary education by all children in the 6-14 age group.

The correct answer is International Monetary Fund.

Key Points

• Gita Gopinath a Prominent Indian-American economist has joined as the chief economist of the International Monetary Fund, becoming the first woman to occupy the top post at the global lender.
• She became the 11^th  chief economist of the International Monetary Fund.
• She is on leave of public service from the economics department of Harvard University where she is the John Zwaanstra Professor of International Studies and Economics.
• Gita Gopinath is also a co-director of the International Finance and Macroeconomics program at the National Bureau of Economic Research and has worked as the Economic Adviser to the Chief Minister of Kerala state.

Additional Information

• IMF headquarters is in Washington D.C. The present Managing Director is Kristalina Georgieva.
• The World Bank headquarter is in Washington D.C. The Present President is Mr David Malpass.
• The Asia Infrastructure Investment Bank headquarter is in Beijing. The Present President is Mr Jin Liquin.
• The Asia Development Bank headquarter is in Manila. The Present President is Mr Masatsugu Asakawa.

The correct answer is Bhaskaracharya.

Key Points

• Lilavati was written by Bhaskaracharya. He was an Indian mathematician who treatise on mathematics subjects, written in the year 1150.
• It is the first volume of his main work, the Siddhanta Shiromani, alongside the Bijaganita, the Grahaganita, and the Goladhyaya.
• The book Lilavati contains thirteen chapters, mainly definitions, arithmetical terms, interest computation, arithmetical and geometrical progressions, plane geometry, solid geometry, the shadow of the gnomon, the Kuṭṭaka - a method to solve indeterminate equations, and combinations.
• Bhaskara II gives the value of pi as 22/7 in the book but suggests a more accurate ratio of 3927/1250 for use in astronomical calculations.
• Also according to the book, the largest number is the parardha equal to one hundred thousand billion.

The correct answer is Nuclear Fusion.

Key Points

• Nuclear fusion is the process where the nuclei of two light atoms combine to form a  new nucleus.
• Nuclear Fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons). The difference in mass between reactant and products is manifested as either the release of the absorption of energy. This difference in mass arises due to the difference in atomic binding energy between the nuclei before and after the reaction.
• Fusion is the process that powers active or main sequence stars and other high-magnitude stars, where large amounts of energy are released.
• The fusion process that produces nuclei lighter than iron-56 or nickel=62 will generally release energy. These elements have a relatively small mass per nucleon and large binding energy per nucleon.
• A fusion of nuclei lighter than these releases energy (exothermic process) while the fusion of heavier nuclei results in energy retained by the product nucleons and the resulting reaction is endothermic.

Image of the working process of the Nuclear Fusion:

Additional Information

• The nucleus of a heavy atom (such as uranium, plutonium, or thorium), when bombarded with low-energy neutrons, can be split apart into lighter nuclei. This process is called nuclear fission.

• Fission occurs when a neutron slams into a larger atom, forcing it to excite and split into two smaller atoms—also known as fission products.

• A chain reaction refers to a process in which neutrons released in fission reaction produces an additional fission reaction in at least one further nucleus. This nucleus, in turn, produces neutrons, and the process repeats.

• During this reaction, a tremendous amount of energy is released.

Important Points

• Fission reaction can further be classified into controlled and uncontrolled fission reaction.
• In controlled fission, the chain reaction is controlled and only a controlled amount of reaction is allowed, nuclear reactors in nuclear power plants are one of the examples of the controlled fission reaction.
• And for an uncontrolled fission chain reaction, and it is allowed to happen unless fission material is over, the atomic bomb is one of the examples of an uncontrolled fission reaction.

The correct answer is Fungi.

Key Points

• Athlete's foot is caused by the same type of fungus that causes ringworm and jock itch. This can be caused by Damp socks and shoes and warm, humid conditions favor the organisms' growth.
• It occurs when the tinea fungus grows on the feet. We can catch the fungus through direct contact with an infected person, or by touching surfaces contaminated with the fungus.
• The fungus thrives in warm, moist environments. They normally live on the skin, hair, and nails called dermatophytes. When the environment they live in gets warm and moist, they grow out of control and start to cause symptoms.

Important Points

• Fungi are unicellular or multicellular thick-cell-walled heterotroph decomposers that eat decaying matter and form tangles of fibers.
• They use complex organic compounds as a source of energy and carbon, not photosynthesis.
• They are found in almost any habitat, but live mostly on land, primarily on soil or plant material rather than in sea or freshwater.
• A small number of fungi cause diseases in animals.
• Mycology is a branch of biology that studies fungi.

The correct answer is 344 m/sec.

Key Points

• The speed of sound is the distance traveled per unit of time by a sound wave as it propagates through an elastic medium.
• At 20 °C (68 °F), the speed of sound in air is about 344 meters per second.
• It depends strongly on temperature as well as the medium through which a sound wave is propagating.
• The speed of sound in an ideal gas depends only on its composition and temperature. The speed has a weak dependence on pressure and frequency in ordinary air, deviating slightly from ideal behavior.

The correct answer is Newton's Law.

Key Points

• Newton's Third Law of Motion states that 'To every action, there is an equal and opposite reaction'.
• When the rocket is ignited, it releases gases from its thrusters thereby creating a force that will push the rocket upwards which provides a necessary force that helps it in moving ahead.
• Newton's Second Law of motion states that the rate of change of momentum of an object is proportional to the applied force in the direction of the force. i.e. F=ma. Where F is the force applied, m is the mass of the body, and a is the acceleration produced.
• A fielder pulling his hand back while catching a ball is an application of Newton's second law of motion.
• Newton's First law states that Every object remains in uniform motion in a straight line unless compelled to change its state by the action of an external force.
• When a bus starts suddenly, the passengers receive a backward jerk an application of Newton's first law of motion.

The correct answer is Silicon.

Key Points

• Commercial fertilizer means a fertilizer or other substance containing one or more essential available plant nutrients that is distributed for its plant nutrient content and is designed for use and has value in promoting plant growth.
• The Fertilizers typically provide nutrients , in varying proportions they are:
• (i) six macronutrients: nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and sulfur (S); and (ii) eight micronutrients: boron (B), chlorine (Cl), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), zinc (Zn) and nickel (Ni).

Additional Information

• Silicon is a chemical element with the symbol Si and atomic number 14.
• It is a crystalline solid, hard, and brittle with a blue-grey metallic lustre, and is a tetravalent metalloid and semiconductor.
• Silicon is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, and lead are below it

The correct answer is Diamond.

Key Points

• Among the following options, Diamond has the highest density.
• It has density, ranging from 3150 to 3530 kilograms per cubic metre.
• The density, of a substance, is its mass per unit volume.
• Diamond is an allotrope of carbon.
• Diamond is the hardest and has the highest thermal conductivity and is least compressible of all known substances.
• Graphite is a naturally-occurring form of crystalline carbon and is smooth, electrically conductive and used in pencils and as grease material.

The correct answer is Footsie(FSE).

Key Points

• The FTSE 100 Index ("footsie") is the main share index of the 100 most highly capitalized UK companies listed on the Main Market.
• It follows the capitalization-weighted method. It has a market capitalization of around 2.054 trillion pounds.
• The FTSE was founded in 1801, making it one of the oldest exchanges in the world. Its current premises are situated in Paternoster Square close to St Paul's Cathedral in the City of London.
• It is part of the London Stock Exchange Group (LSEG). LSEG was created in October 2007 when the London Stock Exchange merged with Milan Stock Exchange, Borsa Italiana.

Additional Information

 

Given:

Rate of weaving of cloth = 0.128 m/s

Calculations:

Let the time required to loom 25 meters in x seconds

x × 0.128 m/s = 25m 

x = 25 × 1000/128

x = 125/16 × 25

x = 195.31 ≈ 195

x = 195 seconds

Given:

Percentage of voters cast their vote = 75%

Invalid vote percentage = 2%

Candidate got votes 75% of valid votes = 9261

Calculation:

Let us take the total number of voters be x

casted vote % = 75% of x 

valid casted vote = 98% of 75% of x

⇒ 75% of total valid vote = 75% of 98% of 75% of x

⇒ 9261 = 3/4 × 3/4 × 98/100 × x  

⇒ x = (1029 × 16 × 100)/98

⇒ x = 16800 

∴ The total number of voters will 16800

Given:

Amount = 2 × Principal

T= 4 years

Amount = 8 × Principal

Formula Used:

S.I = (P × R × T)/100

A = P + S.I

Calculation:

If A = 2P 

⇒ 2P - P = S.I

then S.I = Principal

⇒ P = (P × R × 4)/100

⇒ R = 25%

When Amount = 8 times of Principle

then S.I = 7P

⇒ 7P = (P × 25 × T)/100

⇒ T = 28 years

 ∴ In 28 years it will amount to 8 times of itself

Sum double itself in 4 hour

Interest is 1 × sum in 4 years

In the question asked 8 times

interest will be 7 × sum

1 sum = 4

⇒ 7 sum = 4 × 7 = 28 years

 ∴ In 28 years it will amount to 8 times of itself

Given:

The cost price of 35 kg of rice  = Rs. 9.50 per kg

the cost price of 30 kg of rice = Rs. 10.50 per kg

Formula Used:

Profit  = (Profit%/100 ) × CP

Calculation:

Total cost price of mixture of 35 kg and 30 kg of rice  = (35 × 9.50 + 30 × 10.50)

Total cost price of 65 kg mixture  = (332.5 + 315) ⇒ Rs. 647.5

⇒Rate per kg of mixture  = 647.5/65

profit of the mixture per kg  = (135/100) × (647.5/65) ⇒ Rs. 13.44

∴ The selling price of the mixture of rice per kg is Rs.13.50

Given:

The ratio of length and breadth = 6 : 5

Difference between the length and breadth of a rectangular plot = 34 meters

Formula Used:

Area of the rectangle = l × b square units

The perimeter of the rectangle = 2 × (l + b)

Calculation:

let us take the  length and breadth  of the rectangle be 6x, 5x respectively

According to the question,

The difference between the length and breadth of plot = Difference in the ratio of length and breadth of the plot.

⇒ 34 = 6x - 5x

⇒ x = 34 

Lenght of the rectangle = 6 × 34 = 204 meters

Breadth of the rectangle = 5 × 34 = 170 meters

The perimeter of the rectangle = 2 × ( 204 + 174) = 748 meters 

∴ The perimeter of the rectangle is 748 meters

Given:

Required % to pass the exam = 40%

A student scored = 265 marks

Student failed by 55 marks

Calculation:

Let us take the total marks be x

According to the question,

265 + 55 = 40% of x

⇒ 320 = 40/100 of x

⇒ (320 × 100)/40 = x  

⇒ 800 = x

∴ The total marks in the said examination is 800.

Given:

Numerator increased by 200%

Denominator increased by 150%

Resultant fraction = 9/35

Calculation:

Let us take the numerator be x

Let us take the denominator be y

According to the question

(x + 200% of x)/(y +150% of y) = 9/35

⇒ (x+2x)/(y+1.5y) = 9/35

⇒ 35(3x) = (2.5y)9 

⇒ 105x = 22.5y

⇒ x/y = 3/14

∴ The original fraction = 3/14

The logic follows here is:

Similarly,

Hence, the correct answer is "6897".

The logic follows here is:

As Coffee contains Caffeine.

Similarly,

Tobacco contains Nicotine.

Hence, the correct answer is "Nicotine".

• Caffeine, a Stimulant That Can Enhance Brain Function and Boost Metabolism. Caffeine is the most commonly consumed psychoactive substance in the world.
• Novocaine is another term for procaineis a local anesthetic drug of the amino ester group. It is most commonly used in dental procedures to numb the area around a tooth and is also used to reduce the pain of intramuscular injection of penicillin.
• Tannins are chemical compounds found in a variety of plant-based foods and beverages, including tea. They're responsible for giving the tea its dry, somewhat bitter flavor and providing color in certain types of tea.

Putting options in the black spaces:

 

Option (3) is giving a pattern of aaabbbaaabbb. 

No other option is giving any particular pattern.

Hence, the correct answer is "abab".

According to the given information the possible diagram is:

From the above diagram, P is in the south direction with respect to X.

Hence, the correct answer is "South".

Important Points

If the distance is not given between any two variables then an "exact" case will be formed.  

Here, distance is not given so the only possible case is P in the exact south direction with respect to X.

According to the given information, the possible diagram is:

From the above diagram, the Shortest distance between Ashok and Vivek is = 5 + 4 = 9 km

Hence, the correct answer is "9 km".

According to the given information, the logic followed here is:

7, 4, 2, 69

7² + 4² + 2²

= 49 +16 + 4

= 65 + 4

= 69

3, 9, 1, 91

3² + 9² + 1²

= 9 + 81 + 1

= 90 + 1

= 91

2, 6, 5, ?

2² + 6² + 5²

= 4 + 36 + 25

= 40 + 25

= 65

Hence, the correct answer is "65".

The logic followed here is:

Word is coded according to the place value of each letter in that word,

 

 

Similarly, the code for "BABY" is,

 

Hence, the correct answer is "21225".