The vapour pressure of benzene at 25^@C ...

The vapour pressure of benzene at `25^@C` is 63.7 mm of Hg and the vapour pressure of a solution of a solute in `C_6H_6` at the same temperature is 63.9 mm of Hg. The molality of solution is

0.269

0.158

0.486

0.108

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The correct Answer is:

0.158

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