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At 25° C molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 o h m - 1 c m 2 m o l - 1 and at infinite dilution molar conductance is 238 o h m - 1 c m 2 m o l - 1 . The degree of ionisation of ammonium hydroxide at the same concentration and temperature is

Options

  1. A20.800%
  2. B1.008%
  3. C40.800%
  4. D2.080%

Correct answer

B. 1.008%

Step-by-step solution

α = ∧ m ∧ m ∞ = 9.54 238 = 0.04008 = 4.008 %

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