Question

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Answer 1

Answer:

The boiling occur in the whole volume of the liquid because the liquid volume gets continously heating due the this the temperature of liquid volume reaches 100 degree Celsius and thus boiling occur in the whole volume of the liquid.

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According to my point of view this is the correct answer.

Answer 2

Explanation:

Vapourisation can take place at any temperature but boiling can only take place at the boiling point. Since evaporation is a surface phenomenon. The reason of evaporation at any temperature is the molecules of a substance are always in motion.