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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In aqueous solutions Cr2+ is reducing while Mn3+ is oxidising in nature. Reason (R): Extra stability to half filled electronic configuration is observed due to incompletely filled electronic configuration. In the light of the above statements, choose the most appropriate answer from the options given below :

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. (A) is true but (R) is false.
3. Both (A) and (R) are true but (R) is not the correct explanation of (A).
4. (A) is false but (R) is true.

Correct answer: Both (A) and (R) are true and (R) is the correct explanation of (A).

Solution

Both statements are accurate; Cr2+ acts as a reducing agent due to its ability to lose electrons, while Mn3+ is an oxidizing agent as it can gain electrons. The reason provided explains that the stability associated with half-filled electron configurations contributes to the behavior of these ions, making the assertion and reason logically connected.

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