JEE Mains · Chemistry · STD 12 - 2. Electrochemistry
The molar conductance of an infinitely dilute solution of ammonium chloride was found to be \(185 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\) and the ionic conductance of hydroxyl and chloride ions are 170 and \(70 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-}\) \({ }^1\), respectively. If molar conductance of 0.02 M solution of ammonium hydroxide is \(85.5 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\), its degree of dissociation is given by \(\mathrm{x} \times 10^{-1}\). The value of \(x\) is ________ (Nearest integer)
- A 3
- B 6
- C 9
- D 12
Answer & Solution
Correct Answer
(A) 3
Step-by-step Solution
Detailed explanation
\begin{aligned} & \lambda_{\mathrm{m}}^{\circ} \text { of } \mathrm{NH}_4 \mathrm{Cl}=185 \\ & \left(\lambda_{\mathrm{m}}^{\circ}\right)_{\mathrm{NH}_4^{+}}+\left(\lambda_{\mathrm{m}}^{\circ}\right)_{\mathrm{Cl}^{-}}=185 \\ &…
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