MHT CET 2023 13th May Morning Shift | MHT CET Year Wise Previous Years Questions

MHT CET 2023 13th May Morning Shift

MCQ (Single Correct Answer)

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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)

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What is the change in oxidation number of selenium in the following redox reaction?

$$\mathrm{SeO}_{3(\text { (a) })}^{2-}+\mathrm{Cl}_{2(\mathrm{~g})}+2 \mathrm{OH}^{-} \longrightarrow \mathrm{SeO}_{4(\text { (a) })}^{2-}+2 \mathrm{Cl}_{(\text {(a) })}^{-}+\mathrm{H}_2 \mathrm{O}$$

+2 to $$-$$2

$$-$$2 to +2

+4 to +6

+3 to +4

MHT CET 2023 13th May Morning Shift

MCQ (Single Correct Answer)

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A buffer solution is prepared by mixing equimolar acetic acid and sodium acetate. If '$$\mathrm{K}_d$$' of acetic acid is $$1.78 \times 10^{-5}$$, find the $$\mathrm{pH}$$ of buffer solution.

4.75

8.9

9.4

2.6

MHT CET 2023 13th May Morning Shift

MCQ (Single Correct Answer)

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What is the number of moles of nascent hydrogen required to prepare 1 mole of methane from iodomethane?