Decrease in pressure lowers the boiling point of water below 100 degC. Does the melting point not affected by a decrease in pressure ?

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Solution

On increasing pressure the melting point of ice decreases. The reason is water expands when it changes from liquid to solid.

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57. With reference to relationship between pressure and boiling point, which among the

following statements is/are correct?

1. Boiling point of water decreases with increase in atmospheric pressure.

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