Physical Properties Of Materials - Category Wise Question And Answer Practice Test With Solutions

PHYSICAL PROPERTIES OF MATERIALS PRACTICE TEST [2 - EXERCISES]

Set 1

Set 2

Question : 16

Two soap bubbles are held by a tube. What will happen ?

a) Air will not travel

b) Air will travel from bigger to smaller bubble

c) Air will travel through tube

d) Nothing can be said

Answer: (b)

The excess pressure inside a soap bubble is given by,p = ${4T}/r$ As the excess pressure is less in a bigger bubble means the pressure is more inside the bigger bubble.

So, air travels from bigger bubbles to smaller ones.

Question : 17 [IAS (Pre) 1999]

For which one of the following capillarity is not the only reason?

a) Rising of underground water

b) Spread of water drop on a cotton cloth

c) Blotting of ink

d) Rising of water from the roots of a plant to its foliage

Answer: (d)

Question : 18 [MPPCS (Pre) 1999]

A body floats at 4ºC water. If temperature reaches 100ºC, then

a) No change

b) More part of the body will submerge

c) The body will sink

d) The body will float freely

Answer: (c)

Question : 19

Ideal liquid is that liquid

a) whose viscosity is zero

b) whose density is zero

c) which is compressible

d) None of these

Answer: (a)

Question : 20

A container partly filled in a liquid is suspended from a spring balance. A small body is gently dropped in the container. The pointer of spring balance will

a) oscillate

b) read less

c) read the same

d) read more

Answer: (d)

The pointer of spring balance will read more. The increased reading will be equal to the upthrust given by Archimedes principle.

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