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Acetic acid undergoes dimerisation, when dissolved in benzene Molecular mass of acetic acid is found 120. Which among the following relation is correct? D = theroartical vapour density d = observed vapour density

Options

  1. Aα = 2 D - d d
  2. Bα = 2 D - d D
  3. Cα = 2 d - D d
  4. Dα = 2 d D - d

Correct answer

C. α = 2 d - D d

Step-by-step solution

Here α = 1 Because C H 3 C O O H will have molecualar mass = 120 Due to 100% association n =2 (for dimerisation) For association of molecule α = d - D d 1 - 1 n = d - D d 1 - 1 2 = 2 ( d - D ) d

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