set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

In the figure below is shown the flow of the liquid through a horizontal pipe. Three tubes A, B and C are connected to the pipe. The radii of the tubes A, B and C at the junction are respectively 2 cm, 1 cm and 2 cms. It can be said that A B C

a) height of the liquid in the tube A and tube B is the same

b) the height of the liquid in the tube A is maximum

c) height of the liquid in all the three tubes is the same

d) height of the liquid in tube A and C is the same

Question : 2

If an unsaturated sugar solution is prepared by mixing 100 grams of sugar with half litre of water, which of the following physical quantities will not change?

a) Density

b) Concentration

c) Mass

d) Volume

Question : 3

A stretched rubber has

a) increased potential energy

b) increased kinetic energy

c) decreased kinetic energy

d) decreased potential energy

Question : 4

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 : 5

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 : 6

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