Note: In the following questions two or more options may be correct.
Benzoic acid, when dissolved in benzene, which of the following is correct. [NCERT Exemplar]
(a) The benzoic acid will undergo dissociation.
(b) The benzoic acid will undergo association.
(c) Observed molar mass of benzoic acid in benzene will less than normal molar mass.
(d) Observed molar mass of benzoic acid in benzene is more than normal molar mass.
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Answer:
π = iCRT = i nVRT 5.73 = i × 5/1220.1 × 0.0821 × 283 i = 0.6017 α = 1 - i1 - 1/n = 1 - 0.60171 - 1/2 = 0.8 % association = 80%
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