Short Answer Type

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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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Why is cooling caused in evaporation?

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Long Answer Type

Explain the term surface tension.

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Short Answer Type

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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What do you understand by vapour pressure of solids?

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What do you mean by state of dynamic equilibrium?

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Long Answer Type

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

Why does the temperature of the boiling liquid remain constant?

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How will you differentiate between evaporation and boiling?
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Explain why alcohol produces a greater cooling effect on skin that water does.

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