Question

Name the change of state in the following:
1)formation of clouds
2)drying of wet clothes
3) naphthalene ball becoming small,when kept in open air
4)wax kept in sunshine

Answer 1

1.liquid to gas(evaporation)

2.liquid to gas(evaporation)

3.solid to gas(sublimation)

4.sloid to liquid(melting)

Answer 2

Answer:

1. Condensation

2. Evaporation

3. Sublimation

4. Melting or Fusion

Explanation:

1. In the formation of clouds, water evaporated from the surface of water bodies such as seas, oceans, lakes, rivers, etc. by the heat of the sun gets converted into tiny water droplets, due to extreme low temperature, thus forming clouds.

2. In the drying of wet clothes, the water absorbed by the clothes gets heated by the sun and forms vapour, which gets exposed in the atmosphere.

3. Naphthalene balls are capable of sublimation, changing solid directly into gaseous state on being heated. Thus, they get converted into gaseous naphthalene on exposing them in open air.

4. When wax is kept in the sunshine, it gets heated by the rays of the sun and changes into its liquid state, liquid wax.

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