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Pure benzne freezes at 5.3^(@)C. A solut...

Pure benzne freezes at `5.3^(@)C`. A solution of 0.223g of phenyl acetic acid `(C_(6)H_(5)CH_(2)COOH)` in 4.4g of benzene `(K_(f)=5.12 "K kg mol"^(-1))` freezes at `4.47^(@)C`. From the observation one can conclude that :

A

phenyl acetic acid exists as such in benzene

B

phenyl acetic acid undergoes partial ionization in benzene

C

phenyl acetic acid undergoes complete ionization in benzene

D

phenyl acetic acid dimerizes in benzene

Text Solution

Verified by Experts

The correct Answer is:
D
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Pure benzene freezes t 5.3^(@)C . A solution of 0.223 g of phenylacetic acid (C_(6)H_(5)CH_(2)COOH) in 4.4 g of benzene (K_(f) = 5.12 Kkg mol^(-1)) freezes at 4.47^(@)C . From the observation one can conclude that :

Pure benzene freezes t 5.3^(@)C . A solution of 0.223 g of phenylacetic acid (C_(6)H_(5)CH_(2)COOH) I 4.4 g of benzene (K_(f) = 5.12 Kkg mol^(-1)) freezes at 4.47^(@)C . From the observation one can conclude that :

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