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Question

At 25C, molar coductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 ohm1cm2mol1 and at infinite dilution its molar conductance is 238ohm1cm2mol1. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is:

A
2.080%
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B
20.800%
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C
4.008%
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D
40.800%
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Solution

The correct option is C 4.008%
Degree of ionization =λmλm

=9.54238×100=4.008%

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