MP Police Constable : (12 Nov 2025, Shift 2) Memory-Based Paper (Previous Year Paper)

The correct answer is 1974.

Key Points

• The Water (Prevention and Control of Pollution) Act of 1974
• The Act gives regulatory authority to State Pollution Control Boards (SPCB).
• A Central Pollution Control Board (CPCB) formulates policies.
• CPCB coordinates activities of different State Boards.
• The Act grants power to SPCB and CPCB.
• it was amended in the year 1988.
• The 1988 amendment act empowered SPCB and CPCB to close a defaulting industrial plant.

Important Points

• Other pollution control and environmental protection laws
• The Water (Prevention and Control of Pollution) Act of 1974.
• The Air (Prevention and Control of Pollution) Act of 1981.
• Environment (Protection) Act of 1986.

The correct answer is None of the above.

Confusion Points

• Turmeric is an underground stem, which bears nodes and internodes and is fleshy due to the storage of food. Turmeric stem is an example of a rhizome.

Key Points

• A spice is a seed, fruit, root, bark, or other plant substance primarily used for flavouring or colouring food.
• Clove - Flower
• Cinnamon - Inner bark
• Turmeric - Stem
• Spices are distinguished from herbs, which are the leaves, flowers, or stems of plants used for flavouring or as a garnish. 
• for example, cinnamon is bark, ginger is a stem, peppercorns are berries, nigella is a seed, cumin is a fruit, saffron is stigmas, cardamom is pods and seeds, and asafetida is a gum.
• Hence, option 1 is correct.

Additional Information

• Most spices are grown in the tropical regions of the world, with some thriving in the cool misty highlands.
• Many of the seed spices come from more temperate areas, such as coriander seed, which is grown in Northern India, Africa.
• The wheat-producing areas of South Australia and Western New South Wales.
• Pepper, turmeric, cardamom, and cumin are some examples of Indian spices.

Eight persons: P, Q, R, S, T, U, V and W.

1. Three persons sit between S and T.

2. R sits immediate left of T.

3. One person sits between P and Q.

4. Two persons sit between Q and W.

5. V sits immediate left of W.

6) 5) U is not the neighbor of P.

Checking o[tions one by one;

1) Q sits to the immediate right of U → False

2) One person sits between P and R → False

3) Three persons sit between Q and R → False

4) One person sits between S and U → True

Hence, option (4) is the correct answer.

Given:

Amount (A) = Rs. 1,100

Time(T) = 2 years

Rate of simple interest per annum(R) = 5%

Formula used:

Simple interest(SI) = (P × R × T) / 100

SI = A - P

Calculation:

Let, P = principal.

As per the question,

⇒  1100 - P =  (P × 5 × 2) / 100 

⇒  1100 - P =  P /10

⇒ 11P/10 = 1100

⇒ 11P = 11000

⇒ P = Rs 1000

∴ The correct option is 3

The correct answer is Amjad Ali Khan.

Key Points

• Ustad Amjad Ali Khan-
• A distinguished maestro in the field of playing the sarod, Ustad Amjad Ali Khan is popularly known as the “Sarod Samrat“.
• He is the sixth generation sarod player in his family.
• He learned from his father Haafiz Ali Khan, who was a court musician in Gwalior up until Independence in 1947.
• He was awarded India's second-highest civilian honor Padma Vibhushan in 2001.
• The name sarod comes from the Persian ‘sarod’ meaning ‘melody’, alluding to its more melodic tone.

Additional Information

The correct answer is A P de Candolle.

• The term taxonomy was given by A P de Candolle.

Key Points

• AP De Candolle was a Swiss Botanist.
• Taxonomy is defined as the classification of living organisms into different groups based on their nomenclature.
• The three main objectives of taxonomy are Identification, Nomenclature, and Classification.

Additional Information

• Biologists and their Contributions:
• Coined the term ‘cell’-Robert Hooke
• Binomial nomenclature- Carolus Linnaeus
• One gene-one enzyme hypothesis- Beadle & Tatum
• Operon concept- Jacob & Monod
• Jumping genes concept- Dr. McClintock
• Human blood groups- Karl Landsteiner
• Fluid Mosaic Model- Singer & Nicholson

According to the given information:

The shaded part shown in below diagram suggests members of the club who do not play badminton:

So, the total number of members who do not play badminton is = 13 + 6 + 11 = 24 + 6 = 30

Hence, the correct answer is "30".

Given : 

Batsman makes a score of 90 runs in the 17^th innings.

Average increases by 3.

Formula used : 

Average = Sum of all observations/ Number of observations

Calculation : 

Let the average of 16 innings be x.

Sum of 16 innings = 16x 

Average up to 17^th innings

⇒ (16x + 90)/17 = x + 3

⇒ 16x + 90 = 17x + 51

⇒ x = 39

Average = x + 3 = 39 + 3 = 42

∴ The correct answer is 42.

The Correct Answer is Plastic Bags are non-Biodegradable.

Key Points

• Biodegradable plastics are plastics that can be decomposed by the action of living organisms, usually microbes, into the water, carbon dioxide, and biomass.
• Biodegradable plastics are commonly produced with renewable raw materials, micro-organisms, petrochemicals, or combinations of all three.

Additional Information

• According to nature, pollutants can be classified into non-degradable pollutants and Biodegradable pollutants.
• Non-degradable pollutants
• Those pollutants which cannot be broken down into simpler, harmless substances in nature.
• DDT, plastics, polythene, bags, insecticides, pesticides, mercury, lead, arsenic, metal articles like aluminium cans, synthetic fibres, glass objects, iron products and silver foils are non>bio>degradable pollutants. (Tables)
• Bio-degradable pollutants
• Those pollutants which can be broken down into simpler, harmless substances in nature.
• Sewage waste, domestic waste, etc. are the bio-degradable waste.

The correct answer is White surface reflects more heat energy and absorbs less heat energy.

Key Points

• A white surface reflects more heat energy and absorbs less heat energy this is the reason the top and outer surfaces of the house are painted white.
• White color is a poor emitter of heat.
• Hence, white-colored clothes are preferred in summer.

Additional Information

• The black color is a good absorber and a better emitter of heat.
• Hence, the inner side of the solar cooker is painted black
• Transfer of it takes place in three ways conduction, convection, and radiation.

Family Chart:

Now, draw the family tree

• Pointing to a photograph of a boy, a man said " He is the husband of the daughter of daughter of my brother's wife

According to the family tree, it is clear that boy's wife is a 'granddaughter'  of the man's only brother.

Hence, the correct answer is "granddaughter".

Given:

A trader marks his good 40% above the cost price.

He gives 20% discount on the marked price.

Formula Used:

Profit% = (Selling Price - Cost Price)/Cost Price ×  100

Calculation:

Let the cost price be Rs. 100

Marked price = 100 + 40% of 100

⇒ \(100 + \frac{40}{100}× 100\)

⇒ 100 + 40 = 140

He gives a 20% discount on the marked price

Selling Price = 140 - 20% of 140

⇒ \(140 - \frac{20}{100}× 140\)

⇒ 140 - 28

⇒ Rs.112

Profit% = (112 - 100)/100 × 100

⇒ Profit% = 12%

∴ The gain percentage is 12.

The correct answer is Betwa.

Key Points

• Mata Tila Dam is a multi-purpose project.
• It is on river Betwa in Uttar Pradesh & Madhya Pradesh. Hence option 4 is correct.
• It is located in Lalitpur district in Uttar Pradesh.
• It was built in 1958.
• It has the capacity to generate about 45 MW of power,

​

The correct answer is Osteoporosis.

Key Points

• Osteoporosis
• Osteoclasts are the cells that degrade bone to initiate normal bone remodeling and mediate bone loss in pathologic conditions by increasing their resorptive activity.
• They are derived from precursors in the myeloid/monocyte lineage that circulate in the blood after their formation in the bone marrow.
• Osteoporosis increases the size of these spaces, causing the bone to lose strength and density.
• It is often called a silent disease because a person cannot feel the weakening of the bones.
• Breaking a bone is often the first sign of osteoporosis.
• The most common drugs used to treat osteoporosis are called bisphosphonates.
• They help to prevent the loss of bone mass and can be taken orally or by injection.

Additional Information

• Acromegaly
• A disorder in adults in which the pituitary gland produces too much growth hormone.
• Acromegaly is usually caused by a non-cancerous tumor.
• Middle-aged adults are most commonly affected.
• Symptoms include enlargement of the face, hands, and feet.
• Fibrous dysplasia
• Fibrous dysplasia is a disorder where normal bone and marrow are replaced with fibrous tissue, resulting in formation of bone that is weak and prone to expansion.
• It is very rare, and there is no known cure. It is not a form of cancer.

• Concept:

Note:

Multiple of 400 years i.e. 800, 1200, 1600, 2000 have 0 odd days.

• Calculating leap year: For Finding the number of leap year (1 - 99) years, divide the number of years by 4 and the quotient will be the number of leap years.
• Code for weekdays:

• 1987 = 1600 + 300 years (1601 to 1900) + 86 years (1901 to 1986) + year 1987
• No. of odd days from 1601 to 1900 = 1 odd day (5 odd days in every 100 years)
• The total number of odd days from 1901 to 1986 = 21 leap years + 65 ordinary years = 42 + 65 = 107 odd days = 2 odd days.
• In 1600 years, odd days = 0
• So total in 1986 years = 0 + 1 + 2 = 3 odd days
• In 1987, the no. of days up to 5 August = 31(Jan) + 28 (Feb) + 31(Mar) + 30(Apr) + 31(May) + 30(June) + 31(July) + 5 days (Aug) = 217/7 = 0 odd days.

Total in 1987 years up to 5 Aug = 3 + 0 = 3 odd days.

The codes for the weekdays are as follows:

• The day of the week on 5 August 1987 was Wednesday.

Hence, "option 4 " is the correct answer

Given data:

A's income is 40% more than B's income.

Concept: If A's income is 40% more than B's income, then B's income is less than A's income by a certain percentage.

Solution:

⇒ B's income = A's income / (1 + 40/100) = 100/140 of A's income

⇒ B earns less than A by (40/140) x 100% = 200/7%

⇒ 28\(4\over7\)%

Hence, B earns 28\(4\over7\)% less than A.

The correct answer is Gujarat.

Key Points

• Siddi, also known by the names of sheedi and Habshi, is one of the major tribal communities of Gujarat, while a few of them also live in parts of Karnataka, Goa, and Maharastra.
• Most Siddis are believed to be the descendants of slaves, sailors, servants, and merchants from the Bantu-speaking parts of East Africa who arrived and became residents of the subcontinent during the 1200-1900 CE period.
• The cultural heritage of Siddis dates back almost 300 years.

Important Points

• Gujarat
• Capital - Gandhinagar
• CM - Bhupendrabhai Patel
• Governor - Acharya Devvrat

Explanation:

Luminous Flux: The total quantity of radiant energy per second responsible for visual sensation from a luminous body is called Luminous Flux

It Is measured in lumens

One lumen is defined as the luminous flux emitted per unit solid angle from a point source of one candle power.

Candle Power (c.p): The light radiating capacity of a source is called its candle power.

\({\bf{c}}.{\bf{p}} = \frac{{{\bf{Flux}}\;{\bf{emitted}}}}{{{\bf{solid}}\;{\bf{angle}}}} = \frac{{{\bf{lm}}}}{{{\bf{sr}}}}\)

Luminous Intensity (I): Luminous Intensity in any particular direction is the luminous flux emitted by the source per unit solid angle in that direction

Its unit is candela

\({\bf{I}} = \frac{ϕ }{{\bf{ω }}} \)

Where ϕ is luminous flux and ω is the solid angle.

Plane Angle (2-D): The angle subtended at a point by two converging lines lying in the same plane.

It is measured in radians

The ratio of the length of arc to its radius \(\theta = \frac{{arc}}{{radius}}\)

Solid Angle (3-D): The angle subtended by the partial surface area of a sphere at its center.

It is measured in steradians

\(ω = A/{r^2}\)

Where A is area and r is the radius

One steradian is defined as the solid angle that is subtended at the center of a sphere by its surface having an area equal to radius square

The maximum solid angle is approx 12.57, corresponding to the full area of the unit sphere, which is 4π

According to the given statement,

Assumption I: This is not implicit, because nothing is discussed about the relationship between internet and harassment of women.

Assumption II: This is implicit, because harassment of women is clearly a result of lack of moral values. Therefore, it can be assumed that moral education is not being imparted properly at many level.

Mistake Points

Note: Moral education is not properly imparted in the school and college levels. It addresses the broader issue of education and its potential impact on societal behavior.

Hence, “only assumption II” is implicit.

Important Points An Assumption is the missing link of the logical structure of an argument. It is left unsaid and therefore, assumed.

Given:

 a + b = 7 and a - b = 1

Formula used:

(a + b)² - (a - b)² = 4ab

a3 + b3 = (a + b)3 - 3ab(a + b)

Calculation:

(a + b)2 - (a - b)2 = 4ab

⇒ 7² - 1² = 4ab

⇒ 4ab = 48 

⇒ ab = 12

Now, a3 + b3 = (a + b)³ - 3ab(a + b)

⇒ 7³ - 3 × 12 × 7

⇒ 343 - 252 = 91

∴ a3 + b3 = 91

The correct answer is Lord Shiva.

Key Points

• The Ramappa Temple, also known as the Ramalingeswara Temple, is dedicated to Lord Shiva.
• The temple is located in the village of Palampet, Venkatapur Mandal, in the Mulugu district of the Indian state of Telangana.
• The Ramappa Temple is a remarkable example of Kakatiya architectural style, named after the sculptor Ramappa who built it, as per the instructions of the general Recherla Rudra during the Kakatiya rule in 1213 AD.
• It's known for its intricate carvings and exquisite sculpture, featuring themes from Hindu mythology, epic narratives, and folklore.
• The temple's notable elements include its sandstone sculptures, floating bricks, intricate carvings, and a dancing hall with unique pillars.

Additional Information

• Here's a table detailing different temples dedicated to the different deities mentioned in the options:

In epidemiology, an infection is said to be endemic in a population when that infection is constantly maintained at a baseline level in a geographic area without external inputs.

Additional Information

Pandemic:

A pandemic is an epidemic of an infectious disease that has spread across a large region, for instance multiple continents or worldwide, affecting a substantial number of individuals.

Epidemic:

A large number of people or animals suffering from the same disease at the same time. 

Outbreak:

The sudden start of something unpleasant can be called as outbreak. 

Outbreak carries the same definition of epidemic, but is often used for a more limited geographic area.

In the last fifteen to eighteen years, the internet has expanded rapidly all over the world, leading to huge levels of exposure and judgement directed at teenagers. This has led to rising stress levels amongst teenagers who were not present in the last century. Hence, the argument I holds true.

A situation that might cause stress to one person might or might not be stressful to others. Hence, it is true that stress is a relative perception that can be managed with proper guidance.

Therefore, argument II also holds true.

Given:

Time taken by A to complete the work = 9 days

Time taken by B to complete the work = 12 days

Calculation:

Total work = L.C.M. of (12, 9) = 36 units

Efficiency of A = 36/9 = 4 units/day

Efficiency of B = 36/12 = 3 units/day

Combined efficiency of A and B = (3 + 4) = 7 units/day

If they work together on it for 5 days = 7 × 5 = 35 unit

The fraction of the work left is = 1/36

The fraction of the work left is 1/36

The correct answer is a and d

Key Points

• Sambhar lake and Chilika lake are salt-water lakes.
• Sambhar lake is India's largest inland salt-water lake located in Rajasthan.
• Chilika lake is the largest coastal lagoon in India and the second largest in the world, situated in Odisha.
• Dal lake and Wular lake are freshwater lakes located in Jammu and Kashmir.

Additional Information

• Dal lake is known for its houseboats and scenic beauty, often referred to as the "Jewel in the crown of Kashmir".
• Wular lake is one of the largest freshwater lakes in Asia, crucial for the hydrography of the Kashmir region.
• Salt-water lakes are usually found in regions with high evaporation rates and limited outflow, leading to the accumulation of salts.
• These lakes play a significant role in the local economy and ecology, supporting various species of flora and fauna.

The correct answer is Loud sound.

Key Points

• Sound travels as a longitudinal wave.
• A sound wave traveling through air is indeed a longitudinal wave with compressions and rarefactions.
• The study of sound is called acoustics.
• The large amplitude of sound vibrations will produce a loud sound.
• The intensity of sound is identified by loudness.
• The loudness of sound is proportional to the square of the amplitude of the vibration producing the sound.
• If the amplitude of vibration is large, the sound produced is loud.
• If the amplitude is small, the sound produced is feeble.
• The loudness of sound depends on the amplitude of vibration of sound-producing objects.
• Sound is a mechanical wave and needs a material medium like air, water, steel.
• The speed of sound depends on the properties of the medium through which it travels.
• Sound cannot travel in a vacuum.
• Sound travels faster in solids.
• The audible range of an average human is 20 Hz — 20 kHz.
• Speed of sound in air = 343 m/s.
• Hertz(Hz) is the unit of the frequency of sound.
• Decibels(dB) is the unit of Intensity of sound.

The logic followed here is:

So, the 'Tractor' is used to plough a field,

But, 'Tractor' is called 'Car'.

Hence, the correct answer is "Option (4)".

Shortcut Trick

Direct Identity: (a − 1/a) = √[(a + 1/a)² − 4]

Given: a + 1/a = 4

Substitute: √[4² − 4] = √[16 − 4] = √12

Simplify: √12 = 2√3

∴ The correct answer is 2√3.

Alternate Method

Given: a + 1/a = 4

Formula Used: (x + y)² − (x − y)² = 4xy

⇒ Let x = a and y = 1/a

⇒ (a + 1/a)² − (a − 1/a)² = 4 × a × (1/a)

⇒ (a + 1/a)² − (a − 1/a)² = 4

⇒ (4)² − (a − 1/a)² = 4

⇒ 16 − (a − 1/a)² = 4

⇒ (a − 1/a)² = 16 − 4

⇒ (a − 1/a)² = 12

⇒ a − 1/a = √12

⇒ a − 1/a = √(4 × 3)

⇒ a − 1/a = 2√3

∴ The correct answer is 2√3.

Additional Information

Square Reciprocal Relation

If x + 1/x = k, then x² + 1/x² = k² − 2. Conversely, if x − 1/x = k, then x² + 1/x² = k² + 2.

Cubic Reciprocal Relation

If x + 1/x = k, then x³ + 1/x³ = k³ − 3k. If x − 1/x = k, then x³ − 1/x³ = k³ + 3k.

Direct Conversion Rule

To convert (x + 1/x) to (x − 1/x) directly, use (x − 1/x) = √[(x + 1/x)² − 4]. To convert (x − 1/x) to (x + 1/x), use (x + 1/x) = √[(x − 1/x)² + 4].

The correct answer is Wells.

Key Points

• The highest source of irrigation in Madhya Pradesh is wells and tube-wells.
• It covers approx 66.68% of the total irrigated land of MP
• Malwa Plateau and Northern districts like Bhind Morena, Chattarpur, Indore, Jabalpur, Vidisha, etc. are using wells for irrigation.

Additional Information

• The second-largest source of irrigation is canals in MP.
• 17.72% of the total irrigated area is irrigated by canals.
• Main Canals: Chambal, Tawa, Halali, Barna, Wainganga, Bargi, and Bhander.
• Approx 3.2% of agricultural land in MP is irrigated by Ponds.
• A major source of irrigation in Balaghat and Seoni districts.
• Other resources like drains, watersheds, etc. cover almost 12.40% area of the total irrigated agricultural land in MP.

Important Points

• Irrigation capacity till 2011-12 was 78.80 lakh hectare which is increased to 113.94 lakh hectare in 2017-18 in MP.
• The irrigation department was established in 1905 in Gwalior.
• The highest irrigated district is Gwalior(61%).
• The least irrigated district is Dindori(0.8%).

The Correct Answer is Canal rays.

Key Points

• Canal rays:
• The positively charged particles in the modified cathode ray tube are also known as Canal rays.
• An anode is a positively charged electrode while a cathode is a negatively charged electrode.
• Canal rays are new types of rays produced from the anode moving towards the cathode and passing through the holes of the cathode.
• Modified cathodes are called corona particles in the canal ray tube.
• These rays are positively charged and are called positive rays or canal rays or anode rays.
• These rays were discovered by Goldstein.

Additional Information

• Neutrons:
• Neutrons along with protons are found in the nucleus of an atom.
• Neutrons have zero charges which mean they are neutral particles.
• X-rays (0.01 to 10 nm):
• X-rays have much higher energy and much shorter wavelengths than ultraviolet light that can pass through solid objects, including the body.
• Wilhelm Conrad Roentgen discovered the X-rays.
• Ultraviolet rays:
• Ultraviolet (UV) light falls in the range of the EM spectrum between visible light and X-rays.
• UV radiation is classified into three types based on its wavelength.
• They are ultraviolet A (UVA) (315–400 nm), ultraviolet B (UVB) (280–315 nm), and ultraviolet C (UVC) (180–280 nm).
• The shorter the wavelength, the more harmful the UV radiation.

Total no. of years difference between 2010 – 2018 = 8

Number of leap years till 2018 = 2 (2012 and 2016)

Number of ordinary years till 2018 = 6

Number of odd days till 2018 = 6 + (2 × 2) = 6 + 4 = 10 odd days

Total number of odd days till 1^st January 2018 = 10 odd days = 3 odd days

So, we have move 3 days backward from Monday i.e., Friday.

Hence, “Friday” is the correct answer.

Shortcut Trick

For a 3-year period at 10%, the Effective Percentage Rate of Compound Interest is 33.1%.

Compound Interest = Principal × 33.1%

⇒ 12,000 × 0.331 = 3,972

∴ The correct answer is Rs. 3972.

Alternate Method

Given: Principal (P) = Rs. 12,000, Time (n) = 3 years, Rate (R) = 10% p.a.

Formula Used: Amount (A) = P(1 + R/100)ⁿ and Compound Interest (CI) = A − P

⇒ A = 12000 × (1 + 10/100)³

⇒ A = 12000 × (11/10) × (11/10) × (11/10)

⇒ A = 12 × 11 × 11 × 11

⇒ A = 12 × 1331 = 15,972

⇒ CI = 15,972 − 12,000

⇒ CI = 3,972

∴ The correct answer is Rs. 3972.

Additional Information

Effective Rate of Interest

For 2 years, effective rate = x + y + (xy/100). For 3 years at 10%, it is 33.1%.

Difference between CI and SI

For 3 years, Difference = P(R/100)² × (3 + R/100).

Compound Interest Formula

CI = P[(1 + R/100)ⁿ − 1] where P is principal, R is rate, and n is time.

The correct answer is 11.

Key Points

• The Association of Southeast Asian Nations (ASEAN) was formed in 1967 by Indonesia, Malaysia, the Philippines, Singapore, and Thailand to promote political and economic cooperation and regional stability.Timor-Leste (East Timor) officially became the 11^th member on 26 October 2025 during the 47^th ASEAN Summit in Kuala Lumpur.​​
• Thus, at present, there are 11member countries of 'ASEAN'.
• Brunei.
• Cambodia.
• Indonesia.
• Laos.
• Malaysia.
• Myanmar.
• Philippines.
• Singapore
• Thailand
• Vietnam
• ​Leste (East Timor)​

Brunei joined in 1984, shortly after its independence from the United Kingdom, and Vietnam joined ASEAN as its seventh member in 1995.

• Cambodia became ASEAN’s tenth member in 1999.
• Laos and Burma were admitted into full membership in July 1997 as ASEAN celebrated its 30^th anniversary.
• The ASEAN Declaration in 1967, considered ASEAN’s founding document, formalized the principles of peace and cooperation to which ASEAN is dedicated.
• The ASEAN Community is comprised of three pillars, the Political-Security Community, Economic Community, and Socio-Cultural Community.

Additional Information

• The Regional Comprehensive Economic Partnership (RCEP) is a proposed agreement between the member states of the Association of Southeast Asian Nations (Asean) and its free trade agreement (FTA) partners.
• The pact aims to cover trade in goods and services, intellectual property, etc.

The correct answer is Calcium Carbonate.

Key Points

• The chief component of the nacre that constitutes the pearl is aragonite (CaCO₃).
• Nacre also contains a small amount of conchiolin, a hornlike organic substance (albuminoid) that is the main constituent of the mollusc's outer shell.
• Pearl also contains Magnesium Carbonate(MgCO₃) along with Calcium Carbonate.

Additional Information

• Calcium carbonate is a common substance found in rocks as the minerals calcite and aragonite and is the main component of eggshells, snail shells, seashells, and pearls.
• The Molar Mass of Calcium Carbonate is 100.0869 g/mol.
• Melting point: 825 °C.

Correct Answer: 61

The given sequence is a series of prime numbers. Prime numbers are natural numbers greater than 1 that have no positive divisors other than 1 and themselves.

Solution:

• After 59, the next prime number is 61.
• 61 is a prime number because it has no divisors other than 1 and 61 itself.
• Therefore, the missing number in the sequence is 61.

Hence, The Correct Answer option 1

Given:

\(108\div36 \times \frac{1}{4}+\frac{2}{5} \times \frac{1}{4}\)

Concept used: 

Follow the BODMAS rule according to the table given below:

Calculation:

⇒ \(108\div36 \times \frac{1}{4}+\frac{2}{5} \times \frac{1}{4}\)

⇒  \(3 \times \frac{1}{4}+\frac{2}{5} \times \frac{1}{4}\)

⇒ \( \frac{3}{4}+\frac{2}{5} \times \frac{1}{4}\)

⇒ \( \frac{3}{4}+\frac{2}{20}\)

⇒ \(\dfrac{15 + 2}{20}\) = \(\dfrac{17}{20}\)

∴ The simplified form is 17/20

• Banabhatta is the writer of the book Harshacharitra.
• Harshacharitra is the biography of King Harsha Vardhan.
• Banabhatta is a court poet of King Harsha.
• He was one of the great patronages of Sanskrit Literature.
• Banabhatta was the writer of the world’s earliest novel Kadambari.

The correct answer is CH₃NO₂.

Key Points

• Nitromethane (CH3NO2) is an important organic chemical raw material with a wide variety of applications as well as one of the most common pollutants.
• It is a polar liquid commonly used as a solvent in a variety of industrial applications such as in extractions, as a reaction medium, and as a cleaning solvent.
• Nitromethane is produced industrially by combining propane and nitric in the gas phase at 350–450 °C (662–842 °F).
• It is slow to deprotonate.
• Nitromethane is a colorless, oily liquid with a mild disagreeable or fruity odor. It is used as a propellant, fuel additive, rocket fuel, and solvent, and in making dyes, textiles, pharmaceuticals, and explosives.
• Nitromethane-or CH3NO2-is one member of a family of explosive compounds that contain nitrogen and oxygen.

Additional Information

• Ch₃NO is the formula used to refer to Nitrosomethane.
• Urea is a nitrogenous compound formed in the liver. It has a chemical formula of CH₄N₂O. It is also known as Carbamide or Ureophil.
• CH₃NO₃ is the chemical formula of Methyl Nitrate.

Total eight friends facing north:-  A, B, C, D, E, F, G and H

1. E is third to the left of G. G is sitting at one of the corners.

2. F is sitting between D and G.

3. H is third to the left of C.

4. B is sitting between H and A.

Hence,  'C' is sitting between A and E.

Shortcut Trick

Given height (h) = 15 cm.

Condition: 4 × (2πrh) = 6 × (2πr²)

8πrh = 12πr² ⇒ 2h = 3r ⇒ r = 2h/3

r = (2 × 15) / 3 = 10 cm.

Volume = πr²h = π × 10² × 15 = 1500π cm³.

∴ The correct answer is 1500π cm³.

Alternate Method

Given: Height (h) = 15 cm. Let radius be 'r'.

Formula Used: Curved Surface Area (CSA) = 2πrh; Area of Bases = 2 × πr²; Volume = πr²h.

⇒ 4 × (2πrh) = 6 × (2πr²)

⇒ 8πrh = 12πr²

⇒ 8 × 15 = 12 × r

⇒ 120 = 12r

⇒ r = 10 cm

⇒ Volume = π × (10)² × 15

⇒ Volume = π × 100 × 15 = 1500π cm³

∴ The correct answer is 1500π cm³.

Additional Information

Total Surface Area of Cylinder

The total surface area includes the curved surface and the two circular bases: TSA = 2πrh + 2πr² = 2πr(h + r).

Volume of a Hollow Cylinder

If R is the outer radius and r is the inner radius, Volume = π(R² − r²)h.

Relationship between Dimensions

When the volume is constant, the height is inversely proportional to the square of the radius: h ∝ 1/r².

The correct answer is option 1

Key PointsAmritlal Begad**:**

• The Narmada - River of Beauty is a famous book of famous litterateur, painter and Narmada thinker Amritlal Begad. Hence option 1 is correct.
• He was born on October 3, 1928, in Jabalpur on the banks of river Narmada and passed away on July 6, 2018.
• Amritlal Begad first did a foot tour of the Narmada river in 1977 and has written books such as Amritsya Narmada, Tire-Tire Narmada, Narmada Tum Kitni Sundar Ho, Narmada River of Beauty, The Narmada River of Joy, etc.

Other Books on the Narmada River:

The correct answer is Iron.

Key Points

• This most common type of anaemia is caused by a shortage of iron in your body.
• Your bone marrow needs iron to make haemoglobin. Without adequate iron, your body can't produce enough haemoglobin for red blood cells.

Additional Information

• The most common cause of anaemia is low levels of iron in the body. This type of anaemia is called iron-deficiency anaemia.
• Your body needs a certain amount of iron to make haemoglobin, the substance that moves oxygen throughout your body. However, iron-deficiency anaemia is just one type.
• Vitamin B12 deficiency anaemia is a condition in which your body does not have enough healthy red blood cells, due to a lack (deficiency) of vitamin B12.
• This vitamin is needed to make red blood cells, which carry oxygen to all parts of your body.
• If left untreated, iron-deficiency anaemia can cause serious health problems. Having too little oxygen in the body can damage organs.
• With anaemia, the heart must work harder to make up for the lack of red blood cells or haemoglobin. This extra work can harm the heart.
• Anaemia is a condition in which you lack enough healthy red blood cells to carry adequate oxygen to your body's tissues.
• Having anaemia can make you feel tired and weak. There are many forms of anaemia, each with its own cause. Anaemia can be temporary or long term, and it can range from mild to severe.

The correct answer is to immediately take steps to bring this matter to the notice of the officers of the cyber police cell.

Key Points

• Ensuring the integrity of the examination process is crucial.
• Informing the cyber police cell allows for a professional investigation.
• Taking immediate action helps prevent any misuse of the leaked information.

 Additional Information

• Cyber Crime Laws: There are legal provisions under the IT Act to handle such breaches.
• Exam Integrity: Maintaining the sanctity of the recruitment process is important for fairness.
• Law Enforcement: Proper reporting ensures that the situation is handled by the appropriate authorities.

Given Fractions:

\(\frac{5}{6}\), \(\frac{7}{8}\), \(\frac{11}{12}\), and \(\frac{3}{10}\)

Calculation:

The fractions are,

⇒ \(\frac{5}{6}\) = 0.834

⇒ \(\frac{7}{8}\) = 0.875

⇒ \(\frac{11}{12}\) = 0.916

⇒ \(\frac{3}{10}\) = 0.3

So, the lowest fraction is \(\frac{3}{10}\).

Hence, the correct answer is "\(\frac{3}{10}\)".

The correct answer is The introduction and passage of Constitutional Amendment bills.

Key Points

• Both the Rajya Sabha and Lok Sabha have equal powers in the introduction and passage of Constitutional Amendment bills as per Article 368 of the Indian Constitution.
• Unlike Money Bills or No-confidence motions, Constitutional Amendment Bills do not require the recommendation of the President before introduction.
• These bills are passed by a special majority, requiring two-thirds of the members present and voting in both Houses, irrespective of whether the bill originates in Rajya Sabha or Lok Sabha.
• Rajya Sabha has equal status in this process, as its consent is mandatory for the amendment to be enacted.
• Some amendments also require ratification by at least half of the state legislatures in addition to the approval of both Houses.

Additional Information

• Money Bills:
• Money Bills can only be introduced in the Lok Sabha as per Article 110 of the Constitution.
• The Rajya Sabha can only make recommendations on Money Bills, which the Lok Sabha may accept or reject.
• The President’s prior recommendation is required for introducing Money Bills.
• No-confidence Motion:
• It can only be moved in the Lok Sabha and not in the Rajya Sabha.
• No-confidence motions are crucial for testing the ruling government's majority in the Lok Sabha.
• National Emergency Resolution:
• The Rajya Sabha has a secondary role in the passage of resolutions for discontinuance of a National Emergency.
• Such resolutions require a simple majority in both Houses.
• Constitutional Amendment Process:
• The process is detailed under Article 368 of the Constitution.
• Amendments are classified as simple, requiring ordinary majority, or complex, needing a special majority and state ratification.
• Special majority requires two-thirds of the members present and voting and more than 50% of the total membership of each House.

The correct answer is Cadmium.

Except for all elements, Cadmium is not included in structural elements.

Cadmium:

• Soft, malleable, ductile, and silvery-white in appearance.
• Symbol – Cd and Atomic number – 48.
• Discovered in 1817 by Stromeyer and Hermann.
• A byproduct of zinc production
• Corrosion-resistant so used as protection for metal surfaces
• Water-insoluble and inflammable (powder form is flammable)

Carbon:

• Black in appearance and of graphite form
• Symbol – C and Atomic number – 6
• 15^th most abundant element in Crust
• Allotropes – Graphite, Diamond, Buckminsterfullerene
• Charcoal and coal (impure carbon) used in metal smelting
• Activated charcoal has applications in purification and filtration.
• Carbon dating is the most common process in which carbon is used.

Oxygen:

• Highly reactive nonmetal and a strongly oxidizing agent
• Symbol – O and Atomic number – 8
• Most common element – O₂ (colorless, odorless) and H₂O (water)
• O₂ is the only gas required for the survival of living beings
• Used in iron smelting
• Toxic at pressures more than 50 KPa

Nitrogen:

• Colorless and exist as solid, liquid, and gas
• Symbol – N and Atomic number– 7
• Discovered by Daniel Rutherford in 1772
• Found in amino acids, nucleic acid (DNA and RNA), and Adenosine triphosphate
• N₂ – strongest triple bond
• Used to manufacture fertilizers, high strength fabrics (as Kevlar), superglue (as Cyanoacrylate)
• Nitrogen-containing drugs – caffeine and morphine
• Transported as liquid nitrogen (cryogenic liquid)

According to the given information,

Thus, according to the given codes 'mi' is the code for the word 'was'.

Hence, the correct answer is "Option 2".

Given:

There are ₹10 notes, ₹20 notes and ₹50 in a ratio of 3N ∶ 5N ∶ 7N.

The total amount of notes is ₹3,360.

Calculation:

According to question,

(10 × 3N) + (20 × 5N) + (50 × 7N) = 3360

⇒ 30N + 100N + 350N = 3360

⇒ 480N = 3360

⇒ N = 3360/480

⇒ N = 7

Now,

The number of ₹20 notes = 5 × 7 = 35

The number of ₹50 notes = 7 × 7 = 49

₹20 notes and ₹50 notes taken together:

⇒ 35 + 49 = 84

∴ The number of ₹20 notes and ₹50 notes taken together is 84.

The Correct Answer is ​9.50%.

In News

• Centre enhances material cost by 9.5% under PM POSHAN scheme.​

Key Points

• Scheme Overview:
• The scheme is called Pradhan Mantri Poshan Shakti Nirman (PM POSHAN).
• It serves hot cooked meals to over 11 crore students.
• Target group includes students in Balvatika and classes 1 to 8 in government and government-aided schools.
• Cost Enhancements:
• The material cost has been increased by 9.50%.
• The Central Government will incur an additional cost of 954 crore rupees in 2025-26 due to this enhancement.
• Foodgrains Provision:
• The Central Government provides approximately 26 lakh metric tonnes of foodgrains through the Food Corporation of India (FCI).
• The government bears 100% cost of foodgrains, including:
• A subsidy of about 9,000 crore rupees per annum.
• 100% transportation cost of foodgrains from FCI depots to schools.

Butane is a hydrocarbon and a highly flammable, colourless, odourless, easily liquefied gas. It is typically used as fuel for cigarette lighters and portable stoves, a propellant in aerosols, a heating fuel, a refrigerant, and in the manufacture of a wide range of products. Butane is also found in Liquefied Petroleum Gas (LPG).

Given series: B, C, E, F and H have different heights.

1) Only C is taller than B.

2) Only two people have heights between F and C.

C > B > _ > F > _

3) E is taller than H.

C > B > E > F > H

Thus, according to the final arrangement, two people have height between H and B.

Hence, "Option 3" is the correct answer.

Shortcut Trick

Area of Square = 12 × 12 = 144 cm².

Breadth of Rectangle = Area ÷ Length = 144 ÷ 18 = 8 cm.

Perimeter = 2 × (Length + Breadth) = 2 × (18 + 8) = 2 × 26 = 52 cm.

∴ The correct answer is 52 cm.

Alternate Method

Given:

Length (l) of rectangle = 18 cm

Side (a) of square = 12 cm

Formula Used:

Area of rectangle = l × b

Area of square = a²

Perimeter of rectangle = 2(l + b)

Calculations:

⇒ Area of Square = 12² = 144 cm²

⇒ Area of Rectangle = Area of Square = 144 cm²

⇒ 18 × b = 144

⇒ b = 144 ÷ 18 = 8 cm

⇒ Perimeter = 2(18 + 8)

⇒ Perimeter = 2 × 26 = 52 cm

∴ The correct answer is 52 cm.

Additional Information

Diagonal of Rectangle

The length of the diagonal is given by √(l² + b²).

Diagonal of Square

The length of the diagonal of a square is a√2.

Perimeter of Square

The total boundary length of a square is 4 × side.

The correct answer is Kerala.

• Ottamthullal is an art form performed only in Kerala.
• The meaning of Ottamthullal is 'poor man's Kathakali'.
• Kunchan Nambiar created this dance form, as an alternative to the Chakyar koothu.
• To protest against the prevalent socio-political structure and prejudices of the society, Kunchan Nambiar used it as a medium.
• Now it is a famous folk art presented in the temples of Kerala.
• Some other dance forms of Kerala:
• Theyyam
• Thiruvathirakali
• Chakyar Koothu
• Koodiyattam
• Kathakali(Classical)
• Mohiniattam(Classical).

The correct answer is thermal decomposition.

Key Points

• Thermal Decomposition
• A decomposition reaction carried out by heating is called thermal decomposition.
• Thermolysis, also known as thermal decomposition, is a chemical decomposition brought on by heat.
• The decomposition temperature of a substance is the temperature at which the substance begins to chemically break down.
• The process is often endothermic because heat is required to break the chemical bonds in the substance that is being broken down.
• A positive feedback loop that results in thermal runaway and maybe an explosion or other chemical event is formed if decomposition is sufficiently exothermic.

Additional Information

• Decomposition Reaction
• One reactant produces two or more products in a decomposition reaction.
• A decomposition Reaction is a type of chemical reaction.
• Chemical breakdowns or analysis reactions are other names for decomposition processes.
• Synthesis, which involves the combination of less complex reactants to create a more complex result, is the reverse of this kind of reaction.
• Hydrogen gas and oxygen gas can be produced from water by electrolysis through a decomposition reaction.

Thus the opposite faces is as shown below:

Note:

Two opposite faces are never seen together or adjacent to each other:

In Figure, I:- The two opposite faces are seen together which is wrong. Thus this cube cannot be made.

In Figure II:- The two opposite faces are seen together which is wrong. Thus this cube cannot be made.

In Figures III:- None of the opposite faces are seen together nor they are adjacent to each other. Thus this cube can be formed.

In Figures IV:- The two opposite faces are seen together which is wrong. Thus this cube cannot be made.

Thus, Figures III can be formed by folding the dice.

Hence, the correct answer is "

".

Additional Information 

• Dices are of two types:

1. Standard Dice
2. Non-Standard Dice.

• Dice has:-

1. faces = 6
2. sides = 12
3. corners = 8

• Two opposite faces never seen together.
• Adjacent faces are never opposite to each other.

Shortcut Trick

Convert the percentage increase into a fraction: 25% = +1/4.

To keep the expenditure constant, the consumption must decrease by the fraction: −1 ÷ (4 + 1).

Required decrease fraction = −1/5.

Percentage decrease in consumption = (1 ÷ 5) × 100 = 20%.

∴ The correct answer is 20%.

Alternate Method

Given:

Price of sugar surges (increases) by 25%.

Overall expenditure of the consumer remains constant.

Formula Used:

Expenditure = Price × Consumption

Percentage Decrease = (Decrease in Value ÷ Original Value) × 100

Calculations:

⇒ Let the original price of sugar be ₹100 per kg and the original consumption be 100 kg.

⇒ Original Expenditure = Price × Consumption = 100 × 100 = ₹10,000

⇒ New Price = 100 + 25% of 100 = ₹125 per kg.

⇒ Since the expenditure remains constant, New Expenditure = ₹10,000

⇒ New Consumption = New Expenditure ÷ New Price = 10000 ÷ 125 = 80 kg.

⇒ Fall in consumption = Original Consumption − New Consumption = 100 − 80 = 20 kg.

⇒ Percentage fall in consumption = (20 ÷ 100) × 100 = 20%.

∴ The correct answer is 20%.

Additional Information

Constant Expenditure Concept

If Total Expenditure is constant, Price and Consumption are inversely proportional to each other, mathematically written as P₁ × C₁ = P₂ × C₂.

Price Reduction Rule

If the price of a commodity decreases by R%, the consumption must be increased by (R ÷ (100 − R)) × 100% to maintain constant expenditure.

AB Rule for Percentage

If quantity A is x% more than quantity B, then B is (x ÷ (100 + x)) × 100% less than A. This direct formula approach saves computation time in ratio-based percentage questions.

The correct answer is Mandu.

Key Points

• Hindola Mahal is located in Mandu, Madhya Pradesh.
• Hindola Mahal
• ​​This building is "T" - shaped in plan, with the main hall and a transverse projection.
• On both sides of the hall are six arched openings.
• This hall originally had a massive vaulted roof.
• The side walls are strengthened with massive sloping buttresses which have given the name "swinging" (Hindola) palace to the building.
• Architecturally, the palace is assigned to the end of the fifteenth century A.D.
• It is one of a set of buildings making up the royal palace complex at Mandu, which consists of the Jahaz Mahal, the Hindola Mahal, the Tawil Mahal.
• The Hindola Mahal might have been constructed during the reign of Hushang Shah about 1425 C.E.

The correct answer is Sedimentation.​

Key Points

• The purification of organic compounds is necessary, though complex, step after its extraction from a natural source or synthesis in the laboratory.
• The method of purification of the organic compound depends mainly on the nature of the compound and the impurities present.
• The important methods for the separation and purification of organic compounds are Crystallization, Sublimation, Distillation, Differential extraction, and chromatography.
• One easy method to check the purity of an organic compound is to either melt or boil it as organic compounds tend to have sharp melting and boiling points. Purification means the removal of unwanted impurities present in an organic compound.

Additional Information

• Some solids can directly pass to the vapour state without going through the liquid phase. The purification technique which exploits this property is called sublimation. It is helpful in separating sublimable compounds from non-sublimable ones.
• The principle in crystallization is that the compound and the impurities have different solubilities in a solvent. A solvent is chosen where the compound to be purified is sparingly soluble, that is, it is sparingly soluble at a lower temperature and soluble at a higher temperature. The solution is heated to get a saturated solution, and on cooling, the crystals of the compounds are removed via filtration.
• The underlying principle behind distillation is that the mixture of liquids can be separated by the difference in their boiling points. The boiling point is defined as the temperature at which the vapour pressure of the liquid is equal to the atmospheric pressure. This method separates volatile liquids from non-volatile liquids.

The logic followed here is:

The Rank of Soumya from the left end = 17^th.

The Rank of Kiran from the right end = 37^th.

The Rank of Soumya from the right end = Rank of Kiran from the right end - 13^th.

37 - 13 = 24^th.

Total number of person in the row = Rank of Soumya from the left end + Rank of Soumya from the right end - 1.

= 17 + 24 - 1 = 40.

Hence, the correct answer is 'Option 2'.

Calculation: 

6 + 66.6 - 6.66 + 666 - 0.66 = ?

⇒ 6 + 66.6 + 666 - 6.66 - 0.66 = ?

⇒ 738.6 - 7.32 = ?

⇒ 731.28 = ?

The correct answer is Kirana Gharana.

Key Points

• Abdul Karim Khan was the founder of the Kirana Gharana of classical music.
• Kirana Gharana is one of the most prominent Indian classical khayal gharanas and is associated mostly with the perfect intonation of notes.
• The Gharana style was further evolved and was established as one of the important styles in modern Indian classical music in the late 19^th /early 20^th centuries by the musicians Abdul Karim Khan and Abdul Wahid Khan.
• The name of this school of music comes from Kirana or Kairana, a town and tehsil of Shamli District in Uttar Pradesh.

Additional Information

The correct answer is Pine.

• Turpentine is obtained from Pine.

Key Points

• Turpentine is a volatile liquid and is distilled from pine resin, which is obtained by tapping trees of the genus Pinus.
• Turpentine is used as a cleaning agent for paints, lacquers, rubber, and varnishes, as well as disinfectants and insecticides.
• It can undergo auto-oxidation in contact with air and can generate heat which may spontaneously ignite in a confined space.

Additional Information

• Oaktree is used for wood used in the construction and aging of wine.
• It is also used to build household furniture like doors, chairs, tables and furniture, and even floors.
• Deodar is known as the Himalayan Cedar tree.
• It is used for its medicinal purposes to treat inflammation, paralysis, kidney stones, fevers, external injuries, low appetite, cramps, and diabetes, etc.

Given:

1) Vijendra walks a certain distance, say X metres, from his home towards the west.

2) Then he turns left and walks 23 metres.

3) After that, he turns left and walks 36 metres.

4) Then he turns left again to walk 23 metres.

5) He finally turns left and walks 18 metres to reach his home.

Final figure according to the given information.

⇒ BC - ED = 36 - 18 = 18 m 

Hence, the correct answer is "18".

Given: 

The average of four numbers is 45

The average of the first two numbers is thrice the average of the other two numbers

Concept used:

Average × Number of entities = Total

Calculation:

Let the first two numbers be a and b and the last two be c and d.

⇒ (a + b)/2 = 3 × (c + d)/2

⇒ (a + b) = 3 × (c + d)

⇒ a + b + c + d = 4 × 45 = 180

⇒ a + b + (a + b)/3 = 180

⇒ a + b (1 + 1/3) = 180

⇒ a + b × 4/3 = 180 

⇒ a + b = 135

∴ The answer is 135.

Shortcut Trick 

Let the average of the last two numbers be 1 unit.

Then the average of the first two numbers = 1 × 3 = 3 units

The sum of the first two = 2 × 3 = 6 units

⇒ 1 × 2 + 2 × 3 = 4 × 45

⇒ 8 units = 180

⇒ 6 units = 180 × 6/8 = 135

The correct answer is Kapil Dev.

Key Points

• Kapil Dev is a former Indian cricketer.
• Nickname: The Haryana Hurricane.
• One of the greatest all-rounders in Indian cricket.
• He led the Indian cricket team that won the 1983 Cricket World Cup.
• The first player to take 200 One Day International wickets.
• He joined the Indian Territorial Army as a Lieutenant Colonel in 2008.
• Notable works:
• By God's Decree.
• Cricket My Style.
• Straight from the Heart.
• We, The Sikhs.

Additional Information

Explanation:

• Saliva contains the enzyme salivary amylase or ptyalin, which performs the digestion of Carbohydrates (starch).
• About 30 percent of starch gets hydrolyzed into a disaccharide – maltose in the mouth itself by this enzyme.
• It requires an alkaline medium (optimum pH 6.8) for proper functioning.

• Saliva also contains an enzyme called lysozyme, it acts as an antibacterial agent that prevents infections.

Additional Information

• Pepsin is an enzyme responsible for the digestion of proteins.
• Pepsin converts proteins into proteoses and peptones (peptides). It is secreted as proenzyme pepsinogen by the peptic cells of the stomach.
• The proenzyme pepsinogen on exposure to hydrochloric acid gets converted into the active enzyme pepsin.
• Trypsin is a proteolytic enzyme, that is helpful in the digestion of proteins.
• Trypsin is produced in an inactive form by the pancreas called trypsinogen.
• The trypsinogen enters the small intestine through the common bile duct and is converted to active trypsin.
• Cellulose is a straight-chain polysaccharide composed of D ­glucose units which are joined by β - glycosidic linkages

The correct answer is to dispatch officers to the scene immediately.

Key Points

• Quick response is crucial in burglary cases.
• Dispatching officers ensures immediate action.
• Taking prompt action can prevent crime and apprehend suspects.

 Additional Information

• Indian Penal Code (IPC), Section 457: Pertains to house-breaking by night.
• Crime Prevention: Immediate response can prevent crimes.
• Law Enforcement: Quick action ensures public safety.

Given values:

Present population = 16000

Annual increase rate = 5%

Time = 2 years

Concept:

Future population = present population ×  (1 + annual increase rate)^time

Calculation:

⇒ Future population = 16000 ×  (1 + 0.05)² = 17640

Hence, the future population of the town after 2 years is 17640.

Shortcut Trick 5% = 1/20

So increased population = 16000 × (21/20) × (21/20)

Increased population = 441 × 40 = 17640

Hence, the future population of the town after 2 years is 17640.

The correct answer is Nepal.

Key Points

• The following countries using the rupee as a currency other than India:-
• Pakistan
• Sri Lanka
• Mauritius
• Nepal
• Seychelles

Additional Information

The correct answer is Pink.

• The color of phenolphthalein in the basic medium is Pink.
• Phenolphthalein is often used as an indicator in acid-base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.
• Phenolphthalein is slightly soluble in water and usually is dissolved in alcohol for use in experiments.
• It is a weak acid, which can lose H+ ions in solution. The nonionized phenolphthalein molecule is colorless, the protonated phenolphthalein ion is orange, and the deprotonated phenolphthalein ion is fuchsia.

Key Points

• Phenolphthalein also serves as a component of universal indicator, together with methyl red, bromothymol blue, and thymol blue.
• It adopts at least four different states in an aqueous solution as a result of pH changes.
• Under strongly acidic conditions, it exists in protonated form (HIn+), providing an orange coloration. Between strongly acidic and slightly basic conditions, the lactone form (HIn) is colorless.
• The doubly deprotonated (In2-) phenolate form (the anion form of phenol) gives the familiar pink color.
• In strongly basic solutions, phenolphthalein is converted to its In(OH)₃− form and its pink color undergoes a rather slow fading reaction and becomes completely colorless above 13.0 pH.

Additional Information

• The correct answer is option(2)

• Qualities Projected in this situation:​ Awareness, Sense of Responsibility and Courage

Key Points 

• Checklist for attempting SRT questions:

1. Read the question and options carefully.
2. Look for options that are realistic, optimistic, and reflect officer-like qualities.
3. Do not skip any situation.
4. Relegate the negative sentences and choose the most logical option among the remaining. As time is an important factor, hence your thinking ability should be swift.
5. React quickly and be logical.

Additional Information Officer qualities: