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The limiting molar conductivities of \( \mathrm{HCl}, \mathrm{CH}_{3} \mathrm{COONa} \) and \( \mathrm{NaCl} \) are respectively 425,90 and \( 125 \mathrm{mho} \mathrm{cm}^{2} \mathrm{~mol}^{-1} \) at \( 25^{\circ} \mathrm{C} \). The molar conductivity of \( 0.1 \mathrm{M} \mathrm{CH}_{3} \mathrm{COOH} \) solutions is \( 7.8 \mathrm{mho} \mathrm{cm}^{2} \mathrm{~mol}^{-1} \) at the same temperature. The degree of dissociation of \( 0.1 \mathrm{M} \) acetic acid solution at the same temperature is
(a) \( 0.10 \)
(b) \( 0.02 \)
(c) \( 0.15 \)
(d) \( 0.03 \)
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