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At 25C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54ohm-1cmmol-1 and at infinite dilution its molar conductance is 238 ohm -1 cm2 mol-1. The degree of ionization of ammonium hydroxide at the same concentration and temperature is:

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 \text{Degree of }(\alpha )=\frac{molar \: conductivity\: at \: conc.c(\wedge ^{c}_{m})}{molar \: conductivity \:at \:infinite\: dilution(\wedge ^{\infty }_{m}) }

(\alpha )=\frac{9.54\Omega ^{-1}cm^{2}mol^{-1}}{238\Omega ^{-1}cm^{2}mol^{-1}}

=0.04008

=4.008%

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