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States of Matter

Short Answer Type

151.

What do you mean by state of dynamic equilibrium?

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152.

Separate portions of chloroform and water at the same temperature are poured on your hands. The chloroform feels colder. Account for this in terms of attractive forces.

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153.

Why is cooling caused in evaporation?

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154.

Explain why alcohol produces a greater cooling effect on skin that water does.

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155.

Why does the temperature of the boiling liquid remain constant?

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Long Answer Type

156.

Explain briefly the boiling point of a liquid. What is the effect of change in external pressure on the boiling point?

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Short Answer Type

157.
Will water boil at a higher temperature at sea level or on the top of a mountain ?

Water will boil at a lower temperature at the top of a mountain since the atmospheric pressure is lesser as compared to sea level. Thus, lesser energy will be required to change water into vapours at the top of a mountain.

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