The equivalent conductance at infinite dilution of NaCl, HCl and CH₃COONa at 298K are 126.0, 426.0 and 91.0 ohm^–1cm² respectively. The value of equivalent conductance of acetic acid at infinite dilution at the same temperature is

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300

391

421

543

answer is B.

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Detailed Solution

$\begin{array}{l} \land_{{CH}_{3} COOH}^{\infty} = \land_{HCl}^{\infty} + \land_{{CH}_{3} COONa}^{\infty} - \land_{NaCl}^{\infty} \\ = 426 + 91 - 126 = 391 \end{array}$

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