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1
MHT CET 2024 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$\mathrm{PbSO}_{4(\mathrm{~s})}+2 \mathrm{e}^{-} \longrightarrow \mathrm{Pb}_{(\mathrm{s})}+\mathrm{SO}_{4 \text { (aq.) }}^{2-}$
B
$\mathrm{Pb}_{(\mathrm{s})}+\mathrm{SO}_{4(\mathrm{oq})}^{2-} \longrightarrow \mathrm{PbSO}_{4(\mathrm{~s})}+2 \mathrm{e}^{-}$
C
$\begin{aligned} \mathrm{PbO}_{2(s)}+4 \mathrm{H}_{(\mathrm{aq})}^{+}+\mathrm{SO}_{4(\mathrm{qq})}^{2-} +2 \mathrm{e}^{-} \longrightarrow \mathrm{PbSO}_{4(\mathrm{~s})} +2 \mathrm{H}_2 \mathrm{O}_{(1)}\end{aligned}$
D
$\begin{aligned} & \mathrm{PbSO}_{4(\mathrm{~s})}+2 \mathrm{H}_2 \mathrm{O}_{(1)} \longrightarrow \mathrm{PbO}_{2(\mathrm{~s})}+4 \mathrm{H}_{(\mathrm{aq})}^{+}+\mathrm{SO}_{4(\mathrm{aq})}^{2-}+2 \mathrm{e}^{-}\end{aligned}$
2
MHT CET 2024 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The conductivity of 0.005 M NaI solution at $25^{\circ} \mathrm{C}$ is $6.07 \times 10^{-4} \Omega^{-1} \mathrm{~cm}^{-1}$. Calculate its molar conductivity

A
$121.4 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
B
$110.1 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
C
$201.1 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
D
$241.4 \Omega^{-1} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
3
MHT CET 2024 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the amount of electricity required in coulombs to convert 0.08 mol of $\mathrm{MnO}_4^{-}$to $\mathrm{Mn}^{2+}$.

A
96500 C
B
38600 C
C
48250 C
D
19300 C
4
MHT CET 2024 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The limiting molar conductivities $\left(\Lambda_0\right)$ for NaCl , KBr and KCl are 126,152 and $150 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$ respectively. What is the $\Lambda_0$ of NaBr ?

A
$128 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
B
$302 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
C
$278 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
D
$176 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$
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