Question

At `25^(@)C` molar conductance of `0.1` molar aqueous solution of ammonium hydroxide is `9.54 ohm^(-1) cm^(2) mol^(-1)` and at infinte dilution its molar conductance is `238 ohm^(-1) cm^(2) mol^(-1)` The degree of ionisation of ammonium hydroxide at the same concentration and termperature is
A. `40.8%`
B. `2.08%`
C. `20.8%`
D. `4.008%`

Answer 1

Correct Answer - D
(d) `alpha=(Lambda_(m)^(c ))/(Lambda_(m)^(@))=(9.54)/(238)=0.004008=4.008%`