AIPMT 2013 Physics and Chemistry Paper

At 25∘C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54ohm−1cm2 mol−1 and at infinite dilution its molar conductance is 238ohm−1cm2mol−1. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is :-