question_answer 72)

  Assertion (A): Redox couple is the combination of oxidised and reduced form of a substance involved in an oxidation or reduction half cell. Reason (R): In the representation\[E_{F{{e}^{3+}}/F{{e}^{2+}}}^{O-}\] and \[E_{C{{u}^{2+}}/Cu}^{O-},F{{e}^{3+}}/F{{e}^{2+}}\]and\[C{{u}^{2+}}/Cu\] are redox couples. (a) Both A and R are true and R is the correct explanation of the A. (b)Both A and R are true but R is not the correct explanation of the A. (c) A is true but R is false. (d) Both A and R are false.

Answer:

  (b) Redox couple is the combination of oxidation and< reduction half cell reaction. \[F{{e}^{2+}}\xrightarrow{Oxidation}F{{e}^{3+}}+{{e}^{-}}\]        Redox ?couple \[C{{u}^{2+}}+2{{e}^{-}}\xrightarrow{\text{Reduction}}Cu\]        of a cell.