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Standard XII

Chemistry

Equivalent, Molar Conductivity and Cell Constant

The molar con...

Question

The molar conductances at infinite dilution for electrolytes $B A$ and $C A$ are $140$ and $120 o h m^{- 1} c m^{2} m o l^{- 1}$ . If the molar conductance at infinite dilution of $B X$ is $198 o h m^{- 1} c m^{2} m o l^{- 1}$ , then at infinite dilution, the molar conductance of $C X$ is__________.

178

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198

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218

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130

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Solution

The correct option is A $178$
$\land_{C X}^{\circ} = \land_{C A}^{\circ} + \land_{B X}^{\circ} - \land_{B A}^{\circ}$
$= 120 + 198 - 140 = 178$ .

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The molar conductances at infinite dilution for electrolytes BA and CA are 140 and 120 ohm−1cm2mol−1. If the molar conductance at infinite dilution of BX is 198 ohm−1cm2mol−1, then at infinite dilution, the molar conductance of CX is__________.

The correct option is A 178∧∘CX=∧∘CA+∧∘BX−∧∘BA=120+198−140=178.

The correct option is A $178$
$\land_{C X}^{\circ} = \land_{C A}^{\circ} + \land_{B X}^{\circ} - \land_{B A}^{\circ}$
$= 120 + 198 - 140 = 178$ .