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NEET UG CHEMISTRY MCQ: ELECTRO CHEMISTRY

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An aqueous solutions containing 1 M each of Au3+,Cu2+,Ag+,Li+{Au}^{3+}, {Cu}^{2+}, {Ag}^{+}, {Li}^{+}is being electrolyzed by using inert electrodes. The value of standard potentials are

E0Ag+/Ag=0.80 V,E0Cu+/Cu=0.34 V,E0Au+/Au=1.50 V,E0Li+/Li=−3.03 V\begin{aligned} & {E}^0{}_{{{Ag}}^{+} / {Ag}}=0.80 \mathrm{~V}, {E}^0{}_{{Cu}^{+} / {Cu}}=0.34 \mathrm{~V}, \\ & {E}^0{}_{{{Au}^{+} / {Au}}}=1.50 \mathrm{~V}, {E}^0{ }_{{Li}^{+} /{Li}}=-3.03 \mathrm{~V} \end{aligned}

With increasing voltage, the sequence of deposition of metals on the cathode will be
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Correct option: C
Au,Ag,Cu{Au}, {Ag}, {Cu}
Option C (Au,Ag,Cu{Au}, {Ag}, {Cu}) is correct because the metal with the highest reduction potential will be deposited first on the cathode.

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