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Assertion(A) Electrolysis of NaCl solution gives chlorine at anode instead of O_(2). Reason(R) Formation of oxygen at anode requires over voltage. |
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Answer» Both ASSERTION and reason are true and the reason is the correct explanation of assertion. Explanation ELECTROLYSIS of NaCl is represented by following chemcial reactions At cathode `H^(+)(aq)+e^(-) rarr(1)/(2)H_(2)(g)` At anode `Cl^(-)(Aq)rarr(1)/(2)Cl_(2)+e^(-),E_("cell")^(@)=1.36V` `2H_(2)O(aq)rarrO_(2)(g)+4H^(+)(aq)+4e^(-):E_("cell")^(@)=1.23V` `E_("cell")^(@)` for this REACTION has lower value but FORMATION of oxygen at anode requires over potential. |
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