set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Oil spreads on water surface because

a) Oil is less dense than water

b) Surface tension of oil is more than water

c) Oil is denser than water

d) Surface tension of oil is less than water

Question : 2

If two bubbles of soap of different diameter come in contact with a tube, then what will happen?

a) The smaller bubble will become smaller and bigger will become bigger

b) The smaller bubble will become larger and larger will become smaller to get the same size

c) The size of both the bubbles will remain same

d) Both bubbles will burst as soon as they come in contact

Question : 3

The separation of cream from milk by churning is due to

a) Cohesive force

b) Centrifugal force

c) Gravitational force

d) None of the above

Question : 4

The bulk modulus for an incompressible liquid is

a) unity

b) zero

c) infinity

d) between 0 and 1

Question : 5

In a capillary tube a fluid rises more as compared to water, it is due to

a) Temperature of fluid is more than that of water

b) Surface tension of fluid is less than that of water

c) Fluid is more viscous than that of water

d) Surface tension of fluid is more than that of water

Question : 6

The rain drops falling from the sky neither injure us nor make holes on the ground because they move with

a) variable acceleration

b) constant acceleration

c) variable speed

d) constant terminal velocity