10th November, 2016 (Prelims)

Revise 10 questions everyday from Prelims Past Papers (2015 to 1979)

If not satisfied with the answers, please search the internet for correct answers & mention the correct answer in the comments section. Our aim is to make you revise these questions. Answer keys of reputed IAS institutes are referred)

Today’s 10 questions from 1991 GS-1 Prelims Paper [Questions 141 to 150]

For previous questions refer yesterday’s post.

Q141 “I have nothing to offer but blood, toil, tears and sweat.” Who said this?

(a) Winston Churchill

(b) Jawaharlal Nehru

(c) Mahatma Gandhi

(d) Mao Tse-Tunq


Q142 In the figure below is given the graph of the speeds of two cars A and B. The straight line OBB’ depicts speed of car A at any instant of time, whereas the horizontal straight line CDD’ depicts the speed of car B at any given time. In the figure, the point of intersection of the two graphs is such that BD = ½AD


In the time interval OA, the ratio of distance covered by car A to the distance covered by car B is

(a) 1 : 2

(b) 2 : 3

(c) 3 : 4

(d) 1 : 1


Q143 A one-metre long rope is placed on the ground and bent to a perfect circle. Then the area in square metres enveloped by the rope will be

(a) p

(b) ¼p

(c) p2

(d) 1/p2


Q144 Which of the following are equal in value?

I. 41

II. 14

III. 40

IV. 04

(a) I and II

(b) II and III

(c) III and IV

(d) I and IV


Q145 A cube of side 2 units is placed in a rectangular coordinate system with its centre at the origin. The coordinates of a set of 4 non-adjacent corners is

(a) (1, 1, 1); (-1, -1, -1); (1, -1, -1);

(b) (1, 1, 1); (-1, 1, 1); (1, -1, 1); (1, 1, -1)

(c) (1, 1, 1); (-1, -1, -1); (-1, 1, 1); (1, -1,-1)

(d) (-1, -1, -1); (1, 1, -1);. (-1, 1, 1); (-1, 1, -1)


Q146 Soap was never actually discovered but instead gradually evolved from crude mixtures of alkaline and fatty material. Up to 1800, soap was believed to be a mechanical mixture of fat and alkali, then Chevreul, a French chemist showed that soap formation, was actually a chemical reaction.

Which one of the following follows from the above statement?

(a) Soap is a natural product, whose existence was later established

(b) Alkaline and fatty material, both being natural material, their mixture which is used as soap is still natural materials mixture

(c) Chevreul discovered the process of soap making

(d) Crude mixing of alkaline and fatty material in early days was actually chemical process of formation of soap




The equation of line AB is Ax + By + C. The equation of line OC which is perpendicular to AB and passes through the origin is

(a) 1991-8

(b) Ay = Bx

(c) By = Ax

(d) 1991-9


Q148 Weights of two pieces, one of gold and one of silver each weighing 100 gm were recorded on a spring balance. Then they were fully immersed in a liquid bath, by letting them hang through a light thread tied to the balance. Compare the recorded weights of the two pieces under that condition. Then

(a) The gold piece will weigh more than the silver piece

(b) The silver piece will weigh more than the gold piece

(c) The weights of the two pieces will be equal

(d) Nothing can be said without knowing the density of the liquid bath


Q149 A cubic metre of water at 0° C is solidified into ice. Density of ice is 0.96 of water at 0° C. Which of the following deductions are true?

I. Water expands when solidified.

II. ice will float in water at 0° C with half its volume above the surface.

III. Density of all liquids are higher than its density when solidified.

(a) I only

(b) II only

(c) III only

(d) I and II


Q150 The rainbow and the rainbow-like colours seen on a thin film of oil on a water surface are two phenomena. They are

(a) Similar in nature and both are due to refraction of light

(b) Different in nature and rainbow is due to interference of light, while colour of thin film is due to diffraction

(c) Similar in nature and both are due to interference of light

(d) Different in nature and rainbow is due to refraction, while colour of thin film is due to interference of light

Tomorrow: Next 10 questions from 1990 paper.

To revise [Questions 131-140] refer yesterday’s post.

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