Molecules of benzoic acid (C 6 H 5 COOH) dimerise in benzene. 'w' g of the acid dissolved…
Chemistry · NEET · NTA Exams — Solutions
Molecules of benzoic acid (C6H5COOH) dimerise in benzene. 'w' g of the acid dissolved in 30 g of benzene shows a depression in freezing point equal to 2K. If the percentage association of the acid to form dimer in the solution is 80, then w is:
(Given that Kf = 5 K kg mol-1, Molar mass of benzoic acid = 122 g mol-1)
- 1.8 g
- 2.4 g
- 1.0 g
- 1.5 g
Answer
(B) 2.4 g
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