Electrochemistry Ques 36
36. At $25^{\circ} C$ molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 $ohm^{-1} cm^{2} mol^{-1}$ and at infinite dilution its molar conductance is $238 ohm^{-1} cm^{2} mol^{-1}$. The degree or ionisation of ammonium hydroxide at the same concentration and temperature is:
[NEET 2013]
(a) $20.800 \%$
(b) $4.008 \%$
(c) $40.800 \%$
(d) $2.080 \%$
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Answer:
Correct Answer: 36.(b)
Solution:
$ \text{ (b) } \alpha=\frac{\Lambda_m}{\Lambda_m^{\infty}}=\frac{9.54}{238}=0.04008=4.008 \% \text{. } $
BETA
