Question

11. Which of the following processes is known as
(a) Change of liquid to solid
(b) Change of solid to liquid
( Change of liquid to vapor
(d) Change of gaseous state to solid state​

Answer 1

1. Change of a substance from a liquid to a solid


=> Freezing


2. Change of a substance from a solid to a liquid .


=> Melting


3. Change of a substance from liquid to vapour


=> Evaporation


4. Change of a substance gaseous state to solid state​. ,


=> Sublimation


AddiTiOnaL InFoRmAtIon -


Triple point of water -


The temperature at which water exists at all the three states simultaneously .

This occurs at 0.1 ° C


Latent heat -

This is the heat required to convert a solid into a liquid or vapour, or a liquid into a vapour, without any change of temperature.


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Answer 2

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Which of the following process is known as:

AnSwer:-

a) Change of liquid to solid state:-

→ Freezing or solidification

For example: Change of water into ice.

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b) Change of solid to liquid state:-

→ Melting

For example: Change of ice into water.

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c) Change of liquid to vapour state:-

→ Evaporization

For example: Use of Acetone for removing nail paint.

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d) Change of gaseous to solid state:-

→ Deposition or Submilation

For example: When dry ice gets exposed to air.

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NOTE:- These all are types of physical changes.

★ Additional Information:-

Physical Changes:

Physical change is when matter changes forms but not chemical identity.

Chemical Changes:

A chemical change results from a chemical reaction.

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