Search Previous Year Questions

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.