JEE Mains · Chemistry · STD 12 - 2. Electrochemistry
Molar ionic conductivities of divalent cation and anion are \(57 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\) and \(73 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\) respectively. The molar conductivity of solution of an electrolyte with the above cation and anion will be _______.
- A \(65 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\)
- B \(130 \mathrm{~s} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\)
- C \(187 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\)
- D \(260 \mathrm{~s} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\)
Answer & Solution
Correct Answer
(B) \(130 \mathrm{~s} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\)
Step-by-step Solution
Detailed explanation
\(\Lambda_{\mathrm{C}}^{+2}=57 \mathrm{Scm}^2 \mathrm{~mol}^{-1}\) \(\Lambda_{\mathrm{A}}^{+2}=73 \mathrm{Scm}^2 \mathrm{~mol}^{-1}\) \(\Lambda_{\text {Solution }}=\lambda_{\mathrm{C}}^{+2}+\Lambda_{\mathrm{A}}^{-2}\) \(=57+73=130\)
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