If the molar conductivity ( m) of a 0.050 mol L -1 solution of a monobasic weak acid is 90 S cm 2 mol -1 , its extent (degree) of dissociation will be [Assume + = 349.6 S cm 2 mol -1 and - = 50.4 S cm 2 mol -1 .]

1. A. 0.215
2. B. 0.115
3. C. 0.125
4. D. 0.225

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