Question

6. Define the following terms: (AS)
a) melting point
b) boiling point
c) evaporation​

Answer 1

Answer:

Melting point: Melting point is the temperature at which a solid becomes a liquid at normal atmospheric pressure.

Boiling point: Temperature at which the vapor pressure of the liquid equals the pressure surrounding the liquid and liquid change to vapor (and vice versa).

Evaporation: Evaporation is the process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure.

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Answer 2

Answer:

(a) Melting point:-

The temperature at which a solid melts to become a liquid is called 'melting point.'

(b) Boiling point:-

The temperature at which a liquid starts boiling at the atmospheric pressure is known as its 'boiling point.'

(c) Evaporation:-

The phenomenon of change of liquid available at any temperature below its boiling point is called 'evaporation.'