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  • In the following questions a statement of assertion A followed by a statement of reason R is given. (A) In the reaction between potassium permanganate and potassium iodide, permanganate ions act as oxidising agent.

In the following questions, a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): In the reaction between potassium permanganate and potassium iodide, permanganate ions act as oxidising agents.
Reason (R): The oxidation state of manganese changes from +2 to +7 during the reaction.
(i) Both A and R are true and R is the correct explanation of A.
(ii) Both A and R are true but R is not the correct explanation of A.
(iii) A is true but R is false.
(iv) Both A and R are false.

Answers (1)

The answer is option (iii) A is true, but R is false.

Explanation: Due to the change of permanganate ion changes to MnO_{2}

As per this equation, the maximum oxidation state that Mn is capable of reaching as per its electronic configuration is +7. Therefore, being an oxidising agent, it cannot undergo oxidation and hence undergoes reduction. On the other hand, Iodine undergoes oxidation from -1 to 0.

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