The number of correct statements from the following is __________
A. E_(cell) is an intensive parameter
B. A negative E⊖ means that the redox couple is a stronger reducing agent than the H⁺ / H₂ 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.

Solution

Chemistry ma’am · 2 steps

Test each line against one idea: intensive or extensive, the sign of E°, and Faraday's laws.

1. Statement	What decides it	Verdict
   A	E_(cell) stays the same for a bigger cell or more electrolyte. Only Δ G = -nFE_(cell) grows with the amount.	Correct, intensive
   B	On the SHE scale, a negative E⊖ means the couple gives up electrons more easily than H₂ does.	Correct, stronger reducing agent
   C	Ag⁺ + e⁻ → Ag needs 1F per mole, but Cu²⁺ + 2e⁻ → Cu needs 2F per mole.	Correct
   D	This is Faraday's first law: w = ZQ, so the mass deposited is proportional to the charge passed.	Correct

2. Intensive versus extensive. Electrode potential is a property of the electrode reaction itself, like temperature or density. Doubling the amount of material does not double the voltage.
3. So. All four statements are true, so the number of correct statements is 4.

The common slip: 3. Marking A as false gives 3. A bigger cell does not give a bigger voltage. Only Δ G, through n, scales with the amount.

The idea to keep. E_(cell) is intensive but Δ G is extensive. A more negative E⊖ means a stronger reducing agent. Charge per mole is nF from the electrode reaction.

Answer from the NTA final answer key. Solution by PrepWiser.