O2 gas will be evolved as a product of electrolysis of: (A) an aqueous solution of AgNO3 using silver electrodes. (B) an aqueous solution of AgNO3 using platinum electrodes. (C) a dilute solution of H

Question

O2 gas will be evolved as a product of electrolysis of: (A) an aqueous solution of AgNO3 using silver electrodes. (B) an aqueous solution of AgNO3 using platinum electrodes. (C) a dilute solution of H2SO4 using platinum electrodes. (D) a high concentration solution of H2SO4 using platinum electrodes. Choose the correct answer from the options given below.

(A) (A) and (C) only
(B) (A) and (D) only
(C) (B) and (C) only
(D) (B) and (D) only

Prashant Kotian · Accepted Answer

Correct answer: C. aq. AgNO3 solution using p+ electrodes AgNO3  Ag+ + NO3– H2O H+ + OH– At cathode Ag+ + e–  Ag At anode 2OH–  O2 + 2H+ +4e– aq. dil H2SO4 using Pt, electrodes H2SO4 2H+ + SO42– H2O H+ + OH– At cathode At anode 2H+ + 2e–  H2 2OH–  2H+ + O2 + 4e– Ans. (3)

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