JEE Main Chemistry question

Which can undergo both oxidation and reduction?

(A)
(B)
(C)Correct
(D)

Answer: (C)

Solution

(A) and (B) already have barium in its fully oxidised, stable state and can only be further reduced, not oxidised. The unusual intermediate ion can either be reduced further to neutral Ba () or oxidised to the

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Question ID VK-137994