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Chemistry · PYQ NEET UG 2019(2)
हिन्दीFollowing limiting molar conductivities are given as, \( \Lambda^\circ_m(H_2SO_4) = x \text{ S cm}^2 \text{mol}^{-1} \), \( \Lambda^\circ_m(K_2SO_4) = y \text{ S cm}^2 \text{mol}^{-1} \), \( \Lambda^\circ_m(CH_3COOK) = z \text{ S cm}^2 \text{mol}^{-1} \). \( \Lambda^\circ_m \) (in \( \text{S cm}^2 \text{mol}^{-1} \)) for \( CH_3COOH \) will be
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Correct answer · Option A
\( \frac{x-y}{2} + z \)
Explanation
\( \Lambda^\circ_m(CH_3COOH) = \Lambda^\circ(CH_3COOK) + \Lambda^\circ(H^+) - \Lambda^\circ(K^+) \). From given values: \( \Lambda^\circ(H^+) = x/2 \), \( \Lambda^\circ(K^+) = y/2 \). Thus, \( \Lambda^\circ_m(CH_3COOH) = z + \frac{x}{2} - \frac{y}{2} = \frac{x-y}{2} + z \).
