MHT CET 2026 20th April Evening Shift | Electrochemistry Question 2 | Chemistry

If molar conductance at infinite dilution for $\text{CH}_3\text{COO}^-$ and $\text{H}^+$ ions are $50\ \text{S cm}^2\ \text{mol}^{-1}$ and $350\ \text{S cm}^2\ \text{mol}^{-1}$ respectively, molar conductivity of $5 \times 10^{-2}$ M $\text{CH}_3\text{COOH}$ is $20\ \text{S cm}^2\text{mol}^{-1}$. What is the hydrogen ion concentration in $\text{mol/dm}^3$ of $\text{CH}_3\text{COOH}$?

$5 \times 10^{-2}$

$5 \times 10^{-3}$

$2.5 \times 10^{-3}$

$2.5 \times 10^{-4}$

MHT CET 2026 20th April Evening Shift

MCQ (Single Correct Answer)

-0

Which of the following expressions indicates the correct relationship between molar conductivity of strong electrolyte and its concentration?

$\Lambda = \Lambda_0 + \sqrt{c}$

$\Lambda = \Lambda_0 - a\sqrt{c}$

$\Lambda = \Lambda_0 + a\sqrt{c}$

$\Lambda = \Lambda_0 - \sqrt{c}$

MHT CET 2026 20th April Morning Shift

MCQ (Single Correct Answer)

-0

Which of the following reactions occurs at cathode during recharging of lead accumulator ?

$\text{PbO}_{2(s)} + 4\text{H}^+_{(aq.)} + \text{SO}_4^{2-}{}_{(aq.)} + 2e^- \rightarrow \text{Pb}_{(s)} + \text{PbSO}_{4(s)} + 2\text{H}_2\text{O}_{(\ell)}$

$\text{PbO}_{2(s)} + 4\text{H}^+\ 2e^- \rightarrow \text{Pb}^{2+} + 2\text{H}_2\text{O}_{(\ell)}$

$\text{Pb}_{(s)} + \text{SO}_4^{2-}{}_{(aq.)} \rightarrow \text{PbSO}_{4(s)} + 2e^-$

$\text{PbSO}_{4(s)} + 2e^- \rightarrow \text{Pb}_{(s)} + \text{SO}_4^{2-}{}_{(aq.)}$

MHT CET 2026 20th April Morning Shift

MCQ (Single Correct Answer)

-0

What is the quantity of electricity required to produce $8$ g of Mg (molar mass = $24\ \text{g mol}^{-1}$) from $\text{MgCl}_2$ solution ?

$0.222$ F

$0.444$ F

$0.666$ F

$0.888$ F

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