Question

10.
Melting point of a substance
a) Decreases on mixing impurities
b) Increases with increase of pressure for some solids
c) Decreases with increase of pressure for some solids
d) All the above

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Answer 1

Answer:

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Explanation:

the answer is b...

Answer 2

Answer:

(1)Melting point depression is the reason why adding salt to frozen streets helps to melt the ice.

(2)Melting it would increase the volume of that substance because liquids take more space than solids. If you increase the pressure, it becomes harder for that transformation to occur.

(3)Generally melting point increases with the increase in pressure. Ice is the exception to this because its melting point decreases with the increase in the pressure. Melting point at standard pressure is a characteristic property of a substance