CBSE 2024 · Region 5 · Set 2 · Q18 · 2 marks

Resistance of a conductivity cell filled with $\displaystyle 0.2 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{KCl}$ solution is $\displaystyle 200 \Omega$. If the resistance of the same cell when filled with $\displaystyle 0.05 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{KCl}$ solution is $\displaystyle 620 \Omega$, calculate the conductivity and molar conductivity of $\displaystyle 0.05 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{KC} l$ solution. The conductivity of $\displaystyle 0.2 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{KC} l$ solution is $\displaystyle 0.0248 \mathrm{~S} \mathrm{~cm}^{-1}$.

CBSE Class 12 Chemistry past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.