The melting point of a substance which contracts on melting (like ice) decreases within pressure.

increase

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decrease

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zero change

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Solution

The correct option is A increase
The melting point of a substance which contracts on melting (like ice) decreases by the increase in the pressure. A few substances, ice, for example, contract as they melt. An increase in pressure makes it easier for the substance to melt and therefore, lowers the melting point.

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The melting point of the substances which contract on melting (like ice) decreases by the ______ in pressure.

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