Question
What is the effect of pressure on melting point of a substance? What is the relegation. Give its one practical application.
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Answer
The melting point of those substances which expands on melting, increases with increase in pressure while the melting point of those substances which contact on melting, decreases with increase in pressure. The phenomenon ‘a' in which ice melts when pressure is increased and again freezes when pressure is removed is called relegation. It is due to the above fact that the skating is possible on snow.
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