Question

A hypothetical electrochemical cell is shown below
Θ Θ
A | A⁺ (xM) || B⁺ (yM) | B
The emf measured is +0.20 V. The cell reaction is
(a) A⁺ + e⁻ ⟶ A; B⁺ + e⁻ ⟶ B
(b) The cell reaction cannot be predicted
(c) A + B⁺ ⟶ A⁺ + B
(d) A⁺ + B ⟶ A + B⁺

Answer 1

YOUR ANSWER IS IN THE ATTACHMENT PLZZ REFER TO THE ATTACHMENT

Answer 2

(c) A + B⁺ ---> A⁺ + B

Explanation:

Since the emf of the hypothetical electrochemical cell is positive (+0.20V), the choice of electrodes as mentioned in the convention is correct.

Anode reaction (oxidation):

A ---> A+ + e-

Cathode reaction (reduction):

B+ + e- ---> B

Cell reaction:  

A + B⁺ ---> A⁺ + B, E(0-cell) = +0.20V

Hence Option C is the answer.