set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

A bimetallic strip consists of brass and iron. When it is heated it bends into an arc with brass on the convex and iron on the concave side of the arc. This happens because

a) it is easier to bend an iron strip than a brass strip of the same size

b) brass has a higher specific heat capacity than iron

c) density of brass is more than that of iron

d) brass has a higher coefficient of linear expansion than iron

Question : 2

Which one of the following changes occurs when salt is added into the water?

a) Boiling point is decreased and freezing point is increased

b) Both boiling point and freezing point are decreased

c) Boiling point is increased and freezing point is decreased

d) Both boiling point and freezing point are increased

Question : 3

Which one of the following statement is not true for a person suffering from hypermetropia?

a) The image of the close objects is focused behind the retina

b) The focal length of the lens is large

c) The person can see far objects distinctly

d) A concave lens is used to correct this defect

Question : 4

The correct order of colours in a rainbow is

a) Blue, yellow, green

b) Violet, green, blue

c) Blue, green, violet

d) Blue, green, yellow

Question : 5

Assertion (A):
Reveraberation mainly feels in large churches and in other large buildings.
Reason (R):
The walls, roof and ground may cause multiple sound reflections.
Code

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 : 6

Match the Column - I and Column - II

a) A-Q; B-P; C-T; D-R; E-S

b) A-Q; B-P; C-T; D-S; E-R

c) A-P; B-Q; C-T; D-R; E-S

d) A-Q; B-T; C-P; D-R; E-S