Question

Which of the following is weakest oxidising agent ?

• A. F2
• B. Cl2
• C. Br2
• D. I2

Answer 1

Answer: (D)

I2

Answer 2

F2 + 2e–$\longrightarrow$ 2F– e° = + 2.87 V ; Cl2 + 2e– $\longrightarrow$2Cl– e° = + 1.36 V

Br2 + 2e – $\longrightarrow$2Br –

e° = + 1.09 V ;

I2 + 2e– $\longrightarrow$2I– e° = + 0.54 V

More the value of the SRP, more powerful is the oxidising agent. Hence the order of oxidising power is F2 > Cl2 > Br2 > I2.