set 13 MCQ Questions & Answers Detailed Explanation

Question : 1

The variations in temperature from 0°C to 100°C with respect to time of two liquids P, Q are shown in the graph given below. Which of the following statement is correct?

a) At no point of time during heating did the two liquids have the same temperature

b) P attained the temperature of 100°C faster than Q

c) During heating, liquid P has always warmer than Q

d) Q attained the temperature of 100°C faster than P

Question : 2

Assertion (A):
Woollen clothes keeps us warm.
Reason (R):
Woollen fibres are made from a special type of protein, which is a bad conductor of heat.
Select the correct answer from the codes given below.

a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

b) (A) is true, but (R) is false

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) (A) is false, but (R) is true

Question : 3

For which wavelength of light is our eye most sensitives

a) 200 nm

b) 3.00 nm

c) 555 nm

d) 800 nm

Question : 4

If the temperature of air increases, how would it affect its ability to assume water vapour?

a) Increase

b) Firstly decrease, then again increase

c) Decrease

d) Remains constant

Question : 5

Sky is blue because

a) Blue colour is more absorbing to eyes

b) Short waves are scattered more than long waves by atmosphere

c) Blue colour in the Sunlight is more than other colours

d) Atmosphere absorbs long wavelength more than short wavelength

Question : 6

Which of the following represents convection ?

a) Heating water by keeping the vessel on a flame

b) Land breeze

c) Exhaust fan

d) All of these