NEET UG CHEMISTRY MCQ: ELECTRO CHEMISTRY

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Analyzing +4 | -1

At 298 K, the standard electrode potentials of

C{u^{2 + }}/Cu,Z{n^{2 + }}/Zn,F{e^{2 + }}/Fe\,\,\mathrm{and}\,\,A{g^ + }/Ag

are 0.34 V, - 0.76 V, - 0.44 V and 0.80 V, respectively.
On the basis of standard electrode potential, predict which of the following reaction cannot occur?

View answer and explanation

Correct option: A

2CuS{O_4}(aq) + 2Ag(s) \to 2Cu(s) + A{g_2}S{O_4}(aq)

Option A (

2CuS{O_4}(aq) + 2Ag(s) \to 2Cu(s) + A{g_2}S{O_4}(aq)

) is correct because the cell potential for this reaction is negative, indicating it is non-spontaneous.

More Questions from ELECTRO CHEMISTRY

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4.5 g of Al (at. mass 27 amu) is deposited at cathode from

A{l^{3 + }}

solution by a certain quantity of charge. The volume of

{H_2}

produced at STP from

{H^ + }

ions in solution by the same quantity of charge will be : The correct order of molar conductivity at infinite dilution of

\mathrm{LiCl},{\rm{NaCl {\kern 1pt}{\kern 1pt}and {\kern 1pt}{\kern 1pt}KCl}}

is A solution of copper sulphate

\left(\mathrm{CuSO}_4\right)

is electrolysed for 10 minutes with a current of 1.5 amperes. The mass of copper deposited at the cathode (at. mass of Cu = 63 u) is The desired amount of charge for obtaining one mole of Al from

\mathrm{A}{\mathrm{l}^{3 + }}

is When an aqueous solution of lithium chloride is electrolysed using graphite electrodes : Which are used as secondary reference electrodes?