Question

please please answer me it is an question of 3 marks​

Answer 1

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Melting point-A point at which solid susbstance coverts into liquid is known as MELTING POINT.

Boiling point-A point at which liquid substance converts into vapour(gas) is known as BOILING POINT.

MELTING POINT OF ICE-

Constant temperature at which ice converts into water is called the melting point of ice

BOILING POINT OF WATER-

Constant temperature at which water converts into water vapour is called as boiling point of water

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Answer 2

Melting point:

                   The minimum temperature at which a solid starts to change from its solid state to its liquid state is called its melting point. Melting point varies with different solids according to its density.

Boiling point:

                    The minimum temperature at which a liquid starts to evaporate by the formation of bubbles is called the boiling point of that liquid. The boiling point of the liquid varies with the different liquids according to its density.

The melting point and the boiling point both denotes the atmospheric pressure of the place because, with the rising of atmospheric pressure the substance melts or boils faster than low atmospheric pressure.

The melting point of ice is 0° C and the boiling of water is 100° C.