Two monovalent metals A and B are treated with dilute sulphuric acid. A liberates hydrogen and metal B does not. Predict the half-cell reactions and cell representation when these metals are coupled with H-electrode. Justify your answer with respect to standard electrode potential

Explanation

(i) Comparison of electropositivity of A and B with hydrogen.
(ii) Identification of anode and cathode of the electrochemical cells.
(iii) Half-reactions that take place at the electrodes of the respective cells.