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Chemistry · 2026

JEE Main · 28 January 2026, Shift 2 · Q72

For strong electrolyte Λ_m increases slowly with dilution and can be represented by the equation Λ_m =Λ_m^°- Ac^1 / 2 Molar conductivity values of…

For strong electrolyte $\displaystyle \Lambda_{\mathrm{m}}$ increases slowly with dilution and can be represented by the equation $$\Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\circ}-\mathrm{Ac}{ }^{1 / 2} $$ Molar conductivity values of the solutions of strong electrolyte AB at $\displaystyle 18$°C are given below :
c $\displaystyle \left[\mathrm{mol} \mathrm{L}^{-1}\right]$$\displaystyle 0.04$$\displaystyle 0.09$$\displaystyle 0.16$$\displaystyle 0.25$
$\displaystyle \Lambda_{\mathrm{m}}\left[\mathrm{S} \mathrm{cm}^2 \mathrm{~mol}^{-1}\right]$$\displaystyle 96.1$$\displaystyle 95.7$$\displaystyle 95.3$$\displaystyle 94.9$
The value of constant A based on the above data $\displaystyle \left[\right.$ in $\displaystyle \left.\mathrm{S} \mathrm{cm}^2 \mathrm{~mol}^{-1} /(\mathrm{mol} / \mathrm{L})^{1 / 2}\right]$ unit is $\displaystyle \_\_\_\_$.
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JEE Main 2026 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.