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  4. The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to

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Q. The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to

IIT JEEIIT JEE 1996Solutions

Solution:

In benzene, benzoic acid dimerises as :
$ C_6H_5COOH \rightleftharpoons \frac{1}{2}(C_6H_5COOH)_2$