physical properties of materials - Category wise Question and Answer Practice Test with Solutions

Question : 11 [PCS (Pre) 2003]

Spherical form of raindrop is due to

a) Surface tension

b) Atmospheric pressure

c) Density of liquid

d) Gravitational force

Question : 12

The lift in an aeroplane is based on

a) Theorem of continuity

b) Law of gravitation

c) Pascal’s low

d) Bernoulli’s theorem

Question : 13

Kerosene oil rises up in a wick of a lantern because of

a) surface tension

b) diffusion of the oil through the wick

c) buoyant force of air

d) the gravitational pull of the wick

Question : 14

Surface tension of a liquid is due to

a) electrical force between molecules

b) gravitational force between molecules

c) adhesive force between molecules

d) cohesive force between molecules

Question : 15 [UP (Spl)(Pre) 2004]

A needle sinks in water whereas a ship made of iron floats on it because

a) The ship is flat

b) The ship driver, by power flat engine

c) The edge of the needle is pointed

d) Specific gravity of the needle is greater than that of water displaced by it