Question

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

• A. ionisation of benzoic acid
• B. dimerisation of benzoic acid
• C. trimerisation of benzoic acid
• D. solvation of benzoic acid

Answer 1

Answer: (B)

dimerisation of benzoic acid

Answer 2

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