set 7 MCQ Questions & Answers Detailed Explanation

Question : 1

Mr X was advised by an architect to make outer walls of his house with hollow bricks. The correct reason is that such walls

a) help keeping inside cooler in summer and warmer in winter

b) make the building stronger

c) prevent seepage of moisture from outside

d) protect the building from lightning

Question : 2

When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in

a) pitch and loudness

b) quality only

c) pitch, loudness and quality

d) loudness only

Question : 3

Assertion (A):
In a pressure cooker food is cooked above boiling point.
Reason (R):
Boiling point of water increases as the pressure increases.

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

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

c) A is true, but R is false

d) A is false, but R is true

Question : 4

‘Raman effect’ deals with the light rays passing through

a) Only diamonds

b) Only prisms

c) Only fluids

d) All transparent medium

Question : 5

In which of the following conditions wet clothes will dry earliest?

a) 100% RH, 20ºC temperature

b) 20% RH, 20ºC temperature

c) 100% RH, 60ºC temperature

d) 20% RH, 60ºC temperature

Question : 6

The graph given above indicates change in temperature (Dt) when heat (Q) was given to a substance. Which among the following parts of the graph correctly depict the latent heat of the substance?

a) BC and DE

b) AB and BC

c) CD and DE

d) DE and AB