JEE Main · 2023 · 11 Apr 2023 · Shift 2 · Redox Reactions and Electrochemistry

The number of correct statements from the following is :
(A)

E_{cell}

is an intensive parameter.
(B) A negative

E^{Θ}

means that the redox couple is a stronger reducing agent than the

H^{+} / H_{2}

couple.
(C) The amount of electricity required for oxidation or reduction depends on the stoichiometry of the electrode reaction.
(D) The amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte.

Answer: 4

Solution

The cell potential is an intensive quantity, unchanged by the size of the cell, so the first statement is correct. A negative standard potential places a couple below the hydrogen electrode, so it gives up electrons more readily and is a stronger reducing agent than the

H^{+} / H_{2}

couple, making the second statement correct. The charge required to oxidise or reduce a species depends on the electrons in its electrode reaction, that is on the stoichiometry, so the third is correct, and the amount of substance changed being proportional to the charge passed is Faraday's first law, so the fourth is correct. All four statements are correct.

JEE Main · 2023 · 11 Apr 2023 · Shift 2 · Integer answer

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JEE Main · 2023 · 11 Apr 2023 · Shift 2 · Redox Reactions and Electrochemistry

Solution

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