Question

Which of following are reducing and oxidising agent respectively.

• A. Eu+2, Ce+4
• B. Ce+3, Ce+4
• C. Eu+4, Eu+2
• D. Tb+2, Ce2+

Answer 1

Answer: (A)

Eu+2, Ce+4

Answer 2

Eu2+$\to$ Eu3++ e–
Eu2+ is a good reducing agent
e– + Ce4+ $\to$ Ce3+
Ce4+ is a good oxidising agent

So, the correct answer is (A): Eu+2, Ce+4