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Q.

Strong reducing and oxidizing agents among the following respectively, are

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a

Ce4+ and Tb4+

b

Ce3+ and Ce4+

c

Ce4+ and Eu2+

d

Eu2+ and Ce4+

answer is A.

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Detailed Solution

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Eu exhibits both +2 and +3 oxidation states similarly, Ce exhibits +3 and +4 oxidation states.

Based on Eo value, Ce+4 acts as strong oxidant.

However, Eu+2 is a strong reductant as it changing to the common +3 state. 

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