Question

An electrochemical cell is set up as : Pt; H₂ (1 atm) | HCl (0.1 M) || CH₃COOH (0.1 M) | H₂ (1 atm); Pt. The e.m.f. of this cell will not be zero, because

(a) acids used in two compartments are different

(b) e.m.f. depends on molarities of acids used

(c) the temperature is constant

(d) pH of 0.1 M HCI and 0.1 M CH₃COOH is not same.

Answer 1

Correct option (d) pH of 0.1 M HCI and 0.1 M CH₃COOH is not same.

Explanation :

Since it is a concentration cell and the concentration of ions in two electrolyte solutions (HCl and CH₃COOH) are different, therefore e.m.f. of this cell will not be zero.