question_answer 94)

  Assertion (A) Electrolysis of NaCI solution gives chlorine at anode instead of O2. Reason (R) Formation of oxygen at anode requires over voltage.

Answer:

                  (a) Both assertion and reason are correct and reason is the correct explanation of assertion. Explanation Electrolysis of NaCI is represented by following chemical reactions At cathode At anode   for this reaction has lower value but formation of oxygen at anode requires over potential.