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NEET 2013 Chemistry question

ChemistryElectrochemistryNEET 2013

At C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 ohm cm mol and at infinite dilution its molar conductance is 238 ohm cm mol. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is -

Answer: (3)

Solution

For a weak electrolyte the degree of ionisation (dissociation) is the ratio of the molar conductance at the given concentration to that at infinite dilution (Arrhenius): $α =

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Question ID VK-091345