Which one amongst the following are good oxidising agents?
(a) ${Sm}^{2 +}$
(b) ${Ce}^{2 +}$
(c) ${Ce}^{4 +}$
(d) ${Tb}^{4 +}$
Choose the most appropriate answer from the options given below :

Question

Which one amongst the following are good oxidising agents? (a) Sm 2 + (b) Ce 2 + (c) Ce 4 + (d) Tb 4 + Choose the most appropriate answer from the options given below :

TestHub · Accepted Answer

The common oxidation state of lanthanide is $+ 3$ . The lanthanide ions having $+ 2$ oxidation state undergo oxidation readily, hence they act as reducing agents. The lanthanide ions having $+ 4$ oxidation state undergo reduction readily, hence they act as oxidising agents.

Hence, ${Ce}^{+ 4} and {Tb}^{+ 4}$ act as oxidising agent

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