Which one amongst the following are good oxidizing agents? A. $\mathrm{Sm}^{2+}$ B. $\mathrm{Ce}^{2+}$ C. $\mathrm{Ce}^{4+}$ D. $\mathrm{Tb}^{4+}$ Choose the most appropriate answer from the options given below :

JEE Main · 2023 · 24 Jan 2023 · Shift 2 · d and f Block Elements

Which one amongst the following are good oxidizing agents?
A.

Sm^{2 +}

Ce^{2 +}

Ce^{4 +}

Tb^{4 +}

Choose the most appropriate answer from the options given below :

Answer: (D)

Among these lanthanide ions the oxidising strength depends on how readily each returns to the stable

+ 3

state.

C e^{4 +}

and

T b^{4 +}

lie above

+ 3

and gain an electron readily to reach it, so both act as good oxidising agents.

S m^{2 +}

and

C e^{2 +}

lie below

+ 3

and instead give up an electron, behaving as reducing agents. The good oxidising agents are the two in the

+ 4

state.

JEE Main · 2023 · 24 Jan 2023 · Shift 2 · Single correct option