Which one amongst the following are good oxidising agents?(a) Sm2+(b) Ce2+(c) Ce4+(d) Tb4+Choose the most appropriate answer from the options given below :C onlyD onlyA and B onlyC and D only

The answer is C and D only.

Here's why:

An oxidizing agent is a substance that has the ability to oxidize other substances — in other words, it accepts their electrons.

In the context of redox reactions, the oxidizing strength of an element is determined by its ability to gain electrons, which in turn is influenced by the oxidation state of the element.

(a) Sm2+ : Samarium (Sm) in its +2 oxidation state is not a common or stable state. It does not readily accept electrons, making it a poor oxidizing agent.

(b) Ce2+ : Cerium (Ce) in its +2 oxidation state is also not a common or stable state. It does not readily accept electrons, making it a poor oxidizing agent.

(c) Ce4+ : Cerium (Ce) in its +4 oxidation state is a stable state. It can readily accept electrons, making it a good oxidizing agent.

(d) Tb4+ : Terbium (Tb) in its +4 oxidation state is a stable state. It can readily accept electrons, making it a good oxidizing agent.

Therefore, the correct answer is C and D only.