1
MHT CET 2023 12th May Evening Shift
+1
-0

Calculate the $$\mathrm{E}_{\text {cell }}$$ for $$\mathrm{Zn}_{(\mathrm{s})}\left|\mathrm{Zn}_{(0.1 \mathrm{M})}^{++}\right|\left|\mathrm{Cr}_{(0.1 \mathrm{M})}^{+++}\right| \mathrm{Cr}_{(\mathrm{s})}$$ at $$25^{\circ} \mathrm{C}$$ if $$\mathrm{E}_{\text {cell }}^{\circ}$$ is $$0.02 \mathrm{~V}$$

A
$$-0.05 \mathrm{~V}$$
B
$$0.03 \mathrm{~V}$$
C
$$-0.06 \mathrm{~V}$$
D
$$0.07 \mathrm{~V}$$
2
MHT CET 2023 12th May Evening Shift
+1
-0

A conductivity cell containing $$5 \times 10^{-4} \mathrm{~M} \mathrm{~NaCl}$$ solution develops resistance $$14000 \mathrm{~ohms}$$ at $$25^{\circ} \mathrm{C}$$. Calculate the conductivity of solution if the cell constant is $$0.84 \mathrm{~cm}^{-1}$$

A
$$6.0 \times 10^{-5} \Omega^{-1} \mathrm{~cm}^{-1}$$
B
$$3.0 \times 10^{-5} \Omega^{-1} \mathrm{~cm}^{-1}$$
C
$$9.0 \times 10^{-5} \Omega^{-1} \mathrm{~cm}^{-1}$$
D
$$12.0 \times 10^{-5} \Omega^{-1} \mathrm{~cm}^{-1}$$
3
MHT CET 2023 12th May Morning Shift
+1
-0

Calculate $$\Delta \mathrm{G}^{\circ}$$ for the reaction $$\mathrm{Mg}_{(\mathrm{s})}+\mathrm{Sn}_{(\mathrm{aq})}^{++} \longrightarrow \mathrm{Mg}_{(\mathrm{aq})}^{++}+\mathrm{Sn}_{(\mathrm{s})}$$ if $$\mathrm{E}_{\text {cell }}^0$$ is $$2.23 \mathrm{~V}$$.

A
$$-430.4 \mathrm{~kJ}$$
B
$$215.2 \mathrm{~kJ}$$
C
$$645.6 \mathrm{~kJ}$$
D
$$-860.8 \mathrm{~kJ}$$
4
MHT CET 2023 12th May Morning Shift
+1
-0

Electrolytic cells containing $$\mathrm{Zn}$$ and $$\mathrm{Al}$$ salt solutions are connected in series. If $$6.5 \mathrm{~g}$$ of $$\mathrm{Zn}$$ is deposited in one cell calculate mass of $$\mathrm{Al}$$ deposited in second cell (molar mass : $$\mathrm{Zn}=65, \mathrm{Al}=27$$ ) by passing definite quantity of electricity?

A
2.4 g
B
2.1 g
C
2.7 g
D
1.8 g
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