MHT CET 2025 19th April Evening Shift | MHT CET Year Wise Previous Years Questions

MHT CET 2025 19th April Evening Shift

MCQ (Single Correct Answer)

-0

For a Galvanic cell consisting zinc electrode and standard hydrogen electrode,

$$ \mathrm{E}^{\mathrm{o}}\left(\mathrm{Zn}_{(\mathrm{aq})}^{+2} \mid \mathrm{Zn}_{(\mathrm{s})}\right)=-0.76 \mathrm{~V} $$

Identify the reaction that takes place at positive electrode during working of cell?

$\mathrm{Zn}_{(\mathrm{s})} \longrightarrow \mathrm{Zn}_{(\mathrm{aq})}^{+2}+2 \mathrm{e}^{-}$

$\mathrm{Zn}_{(\mathrm{aq})}^{+2}+2 \mathrm{e}^{-} \longrightarrow \mathrm{Zn}_{(\mathrm{s})}$

$\quad \mathrm{H}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{H}_{(\mathrm{g})}^{+}+2 \mathrm{e}^{-}$

$\quad 2 \mathrm{H}_{(\mathrm{g})}^{+}+2 \mathrm{e}^{-} \longrightarrow \mathrm{H}_{2(\mathrm{~g})}$

MHT CET 2025 19th April Evening Shift

MCQ (Single Correct Answer)

-0

Which from following polymers is classified as fibre?

Nylon 6,6

Urea formaldehyde resin

Polystyrene

Neoprene

MHT CET 2025 19th April Evening Shift

MCQ (Single Correct Answer)

-0

Which from following is a correct representation of reaction rate for reaction stated below?

$$ \mathrm{N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{NH}_{3(\mathrm{~g})} $$

$\frac{\mathrm{d}\left[\mathrm{N}_2\right]}{\mathrm{dt}}=-3 \frac{\mathrm{~d}\left[\mathrm{H}_2\right]}{\mathrm{dt}}=2 \frac{\mathrm{~d}\left[\mathrm{NH}_3\right]}{\mathrm{dt}}$

$\frac{\mathrm{d}\left[\mathrm{N}_2\right]}{\mathrm{dt}}=-\frac{1}{3} \frac{\mathrm{~d}\left[\mathrm{H}_2\right]}{\mathrm{dt}}=\frac{1}{2} \frac{\mathrm{~d}\left[\mathrm{NH}_3\right]}{\mathrm{dt}}$

$-\frac{\mathrm{d}\left[\mathrm{N}_2\right]}{\mathrm{dt}}=-\frac{1}{3} \frac{\mathrm{~d}\left[\mathrm{H}_2\right]}{\mathrm{dt}}=\frac{\mathrm{1}}{2} \frac{\mathrm{~d}\left[\mathrm{NH}_3\right]}{\mathrm{dt}}$

$\frac{\mathrm{d}\left[\mathrm{N}_2\right]}{\mathrm{dt}}=\frac{1}{3} \frac{\mathrm{~d}\left[\mathrm{H}_2\right]}{\mathrm{dt}}=-\frac{1}{2} \frac{\mathrm{~d}\left[\mathrm{NH}_3\right]}{\mathrm{dt}}$

MHT CET 2025 19th April Evening Shift

MCQ (Single Correct Answer)

-0

Which of the following methods is used to prepare dihydrogen with purity greater than 99.5 ?

Electrolysis of pure water

Action of NaOH on zinc

From hydrocarbons

Electrolysis of warm $\mathrm{Ba(OH)_2}$ solution

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