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Chemistry Question on d -and f -Block Elements

Which is good oxidising agent?

  1. Sm+2Sm^{+2}
  2. Ce+2Ce^{+2}
  3. Ce+4Ce^{+4}
  4. Tb+4Tb^{+4}
A

Sm+2Sm^{+2} only

B

Ce+2,Tb4+Ce^{+2}, Tb^{4+}

C

Ce+4Ce^{+4} only

D

Ce2+Ce^{2+} only

Answer

Ce+2,Tb4+Ce^{+2}, Tb^{4+}

Explanation

Solution

Ce+4Ce^{+4} & Tb4+Tb^{4+} are good oxidising agents (both get reduced to +3).

So, the correct option is (B): Ce+2,Tb4+Ce^{+2}, Tb^{4+}