State whether the following statement is true or false:
The melting point of most of the solid substances increases with an increase in pressure.

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True

False

answer is A.

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Detailed Solution

The given statement is true.
Concept: The temperature at which a substance transforms from a solid to a liquid is known as the melting point. The melting point of a substance is influenced by several factors, including temperature, contaminants, pressure, and temperature. Because the pressure varies depending on height, this is why ice formation occurs differently at various altitudes.
Since the melting point of a substance is not mentioned, we shall presume that ice is being discussed for the sake of this discussion (solid form of water). As a result, the melting point of water decreases as the temperature rises. The reason for this is that when pressure is increased, water or ice molecules experience greater forces of attraction because the increased pressure brings them closer to one another, increasing the resistance between them. The melting point decreases as temperature rises due to an increase in resistance. Melting points change depending on the impurities in the substance.
Hence, the given statement is true.

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