Question

When benzoic acid dissolve in benzene, the observed molecular mass is:

Answer 1

Explanation:

Benzoic acid when dissolved in benzene is found to have molecular mass double of its normal molecular mass.

It can be explained by the fact that benzoic acid forms a dimer in benzene solution due to hydrogen bonding.

Molecular Mass of Benzoic acid = 122

Observed molecular mass = 244

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