Question

Assertion: Boiling point of sea water is more than 100°C.
Reason: Soluble impurities increased the boiling point of liquid.
what is true
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Answer 1

Answer:

The boiling point of pure water is 100

0

C.Soluble impurities increase the boiling point of a liquid.

As the sample of water boils at 102

0

C, hence it is not pure.

Impurities does not affect the freezing point, hence the given sample of water will freeze at 0

0

C.

Answer 2

Assertion is true but reason is false.

• The boiling point of pure water is 100°C.

• Boiling point is the temperature when the atmospheric pressure and the vapour pressure are in equilibrium.

• But when water is dissolved with some insoluble  impurities the vapour pressure decreases and hence the boiling point increases.