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2 g of benzoic acid (C 6 H 5 COOH) dissolved in 25 g of benzene shows a depression in freezing point equal to 1.62 K. Molal depression constant for benzene is 4.9 K kg mol –1 . What is the percentage association of acid if it forms dimer in solution?

Options

  1. ADegree of association of benzoic acid in benzene is 86.4 %
  2. BDegree of association of benzoic acid in benzene is 99.2 %
  3. CDegree of association of benzoic acid in benzene is 35.4 %
  4. DDegree of association of benzoic acid in benzene is 91.4 %

Correct answer

B. Degree of association of benzoic acid in benzene is 99.2 %

Step-by-step solution

Correct Option is : (B) Degree of association of benzoic acid in benzene is 99.2 %

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