General Ability NDA/NA Solved Paper 2020-I (51-100)

Total Questions: 50

31. The speakers of major Indian languages belong to how many language families?

Correct Answer: (c) Four
Solution:

The speakers of major Indian languages belong to 4 major language families. The major language families are Indo-Aryan languages, Dravidian languages, Austroasiatic and Sino-Tibetan.

32. Where did Gandhiji initially forge the techniques of Satyagraha?

Correct Answer: (b) South Africa
Solution:

Mahatma Gandhi initially forge the techniques of Satyagraha in South Africa. He initially advocated the doctrine of Satyagraha or non-violent protest against racial discrimination practiced in South Africa.

33. Who was the Viceroy of India at the time of Gandhiji's Dandi march?

Correct Answer: (a) Lord Irwin
Solution:

Lord Irwin was the Viceroy of India at the time of Gandhiji's Dandi march in 1930. This march is also known as salt satyagraha and was an act of non-violent civil disobedience as a campaign of tax resistance and non violent protest against the British salt monopoly.

34. Which one ofthe followingAmerican newsmagazines was highly sceptical of Gandhiji's Dandi march initially but within a week completely changed its opinion and saluted him as a Saint and Statesman?

Correct Answer: (c) Time
Solution:

The Time magazine was highly sceptical of Gandhiji initially but within a week completely changed its opinion and saluted him as a Saint and Statesman following Dandi March. Mahatma Gandhi was declared Time Person of the year in 1930.

35. In which of the following years were passengers trains introduced in England?

Correct Answer: (b) 1825
Solution:

In 1825 passenger trains were introduced for the first time in England. This was powered by steam.

36. The correct relation between the radius of curvature R and focal length fof a spherical mirror is

Correct Answer: (b) R=2f
Solution:

The correct relation between the radius of curvature R and focal length fof a spherical mirror is given by formula R=2f as the focal length of a spherical mirror is half of its radius of curvature.

37. A lemon kept in water in a glass tumbler appears to be larger than its acrual size. It is because of

Correct Answer: (c) refraction of light
Solution:

Due to phenomenon of refraction of light a lemon or other things kept in water in a glass tumbler appears to be larger than its actual size. When light travels from dense medium to rare medium as it passes from water into air. due to refraction water acts as convex lens and lemon and other things appeared bigger than their actual size.

38. Light enters the eye through a thin mambrane called

Correct Answer: (b) cornea
Solution:

The cornea is the transparent part of the eye and covers the front portion of the eye. Light enters the eye through cornea. Cornea covers the pupil, iris and anterior chamber. The main function of cornea is to refract the light as it enters the eye.

39. Name the scientist who first used a glass prism to obtain the spectrum of sunlight

Correct Answer: (c) Isaac Newton
Solution:

Issac Newton was the first scientist who used a glass prism to obtain the spectrum of Sunlight. In 1666, Issac Newton performed this experiment which is famously known as Newton's prism experiment. White light was scatte/sed into seven different colours as it exits from the prism.

40. The cost of energy to operate an industrial refrigerator that consumes 5 kW power working 10 hours per day for 30 days will be

(Given that the charge per kW.h of energy = ₹4)

Correct Answer: (b) ₹ 6,000
Solution:

The total energy consumption in a month is given by, 5 ×10 × 30 =1500 Kwh. As the charge per kWh of energy is
₹4, hence for 1500 Kwh it will be 1500 × 4=6000.