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

Question : 31 [PSC (Pre) 2017]

Fish can survive in a frozen lake because

a) Fish hibernate in ice

b) Water near the bottom does not freeze

c) Fish are warm blooded animals

d) Ice is a good conductor of heat

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Question : 32 [UPPSC (GIC) 2010]

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

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Question : 33 [RAS/RTS (Pre) 2007]

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

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Question : 34 [PSC (Pre) 2019]

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

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Question : 35 [PSC (Pre) 2019]

A liquid is flowing in a streamlined manner through a cylindrical pipe. Alongwith a section containing the axis of the pipe, the flow profile will be

a)

b)

c)

d)

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