7. Transformation of state of matter

5 m.

Answer the case-based question:

Knowing that matters can change its states; when a state change occurs, the properties of substances also change.

Riya after washing clothes, spread them on the terrace to dry. Even though the temperature was moderate, the clothes became dry after some time.

i. Which change of state is taking place in this process?

The moisture in the wet cloth is transformed from liquid to gas, resulting in condensation
The moisture in the wet cloth is transformed from liquid to solid, resulting in evaporation
The moisture in the wet cloth is transformed from gas to liquid, resulting in evaporation
The moisture in the wet cloth is transformed from liquid to gas, resulting in evaporation

ii. What form of energy is used to dry the clothes and how?

Heat energy, it increases the kinetic energy of liquid particles in cloth causing evaporation
Electrical energy, it increases the kinetic energy of liquid particles in cloth causing evaporation
Sound energy it increases the kinetic energy of liquid particles in cloth causing evaporation
Heat energy, it decreases the kinetic energy of liquid particles in cloth causing evaporation

iii. What is the melting point and boiling point of water?

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