set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Elastomers are the materials which

a) have very small elastic range

b) are not elastic at all

c) do not obey Hooke’s law

d) None of these

Question : 2

With the increase of temperature, the surface tension of the liquid

a) remains the same

b) may increase or decrease depending on the density of liquid

c) always increases

d) always decreases

Question : 3

Kerosene rises in the wick of the stove is due to

a) Diffusion

b) Surface tension

c) Osmosis

d) Biogen contraction

Question : 4

A stretched rubber has

a) increased potential energy

b) increased kinetic energy

c) decreased kinetic energy

d) decreased potential energy

Question : 5

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 : 6

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