MHT CET 2023 13th May Evening Shift | Electrochemistry Question 53 | Chemistry

$$\mathrm{Zn}(s)\left|\mathrm{Zn}^{++}(1 \mathrm{M}) \| \mathrm{Pb}^{++}(1 \mathrm{M})\right| \mathrm{Pb}(s)$$ if $$E_{\mathrm{Zn}}^{\circ}=-0.763 \mathrm{~V}$$ and $$E_{\mathrm{Pb}}^{\circ}=-0.126 \mathrm{~V}$$

$$0.637 \mathrm{~V}$$

$$-0.530 \mathrm{~V}$$

$$-0.889 \mathrm{~V}$$

$$0.789 \mathrm{~V}$$

MHT CET 2023 13th May Morning Shift

MCQ (Single Correct Answer)

-0

Calculate $$\mathrm{E}_{\text {cell }}^0$$ if the equilibrium constant for following reaction is $$1.2 \times 10^6$$.

$$2 \mathrm{Cu}_{(\mathrm{aq})}^{+} \longrightarrow \mathrm{Cu}_{(\mathrm{aq})}^{++}+\mathrm{Cu}_{(\mathrm{s})}$$

$$0.36 \mathrm{~V}$$

$$-0.36 \mathrm{~V}$$

$$-0.18 \mathrm{~V}$$

$$0.18 \mathrm{~V}$$

MHT CET 2023 13th May Morning Shift

MCQ (Single Correct Answer)

-0

Identify the overall oxidation reaction that occurs in lead storage cell during discharge.

$$\mathrm{Pb}_{\text {(aq) }}^{++}+\mathrm{SO}_{4(\text { aq) }}^{--} \longrightarrow \mathrm{PbSO}_{4(\mathrm{s})}$$

$$\mathrm{PbSO}_{4(\mathrm{~s})}+2 \mathrm{H}_2 \mathrm{O}_{(f)} \longrightarrow \mathrm{PbO}_{2(\mathrm{~B})} +4 \mathrm{H}_{(\mathrm{aq})}^{+} +\mathrm{SO}_{4(\mathrm{aq})}^{--}+2 \mathrm{e}^{-}$$

$$\mathrm{Pb}_{(\mathrm{s})}+\mathrm{SO}_{4(\text { aq })}^{--} \longrightarrow \mathrm{PbSO}_{4(\mathrm{s})}+2 \mathrm{e}^{-}$$

$$\mathrm{PbSO}_{4(\mathrm{~s})}+2 \mathrm{e}^{-} \longrightarrow \mathrm{Pb}_{(\mathrm{s})}+\mathrm{SO}_{4(\mathrm{aq})}^{--}$$

MHT CET 2023 13th May Morning Shift

MCQ (Single Correct Answer)

-0

Calculate the time required in second to deposit $$6.35 \mathrm{~g}$$ copper from its salt solution by passing 5 ampere current. [Molar mass of $$\mathrm{Cu}=63.5 \mathrm{~g} \mathrm{~mol}^{-1}$$ ]

3600

3700

3860

4000

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