JEE Main Chemistry question

Chemistry Electrochemistry JEE Main

The Edison storage cell is represented as , with half-reactions

, V

, V

Choose the incorrect statement.

(A) increases with increasing concentration of
(B) decreases with increasing concentration of
(C) V
(D) increases with increasing concentration of FeOCorrect

Answer: (D)

Solution

V, confirming (c) is correct. Since both FeO and Fe (and NiO, ) are pure solids with fixed (unit) activity, the cell potential has no dependence whatsoever on the amount/"concentration" of solid FeO present — so the claim that

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Question ID VK-143739