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Characteristics of Equilibrium Constant

Relative humi...

Question

Relative humidity of air is 80% at $27^{\circ} C$ . If the aqueous tension at the same temperature is 27mmHg, partial pressure of water vapour in the air is

A

27 mmHg

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B

25 mmHg

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C

23 mmHg

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D

21.6 mmHg

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Solution

The correct option is D
21.6 mmHg

% relative humidity $= \frac{P_{H_{2} O} v a p o u r i n a i r \times 100}{a q u e o u s t e n s i o n}$

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