p-Block elementsHard

Question

Which of the following is weakest oxidising agent ?

Options

A.F2
B.Cl2
C.Br2
D.I2

Solution

F2 + 2e- → 2F- εo =  + 2.87 V ;     Cl2 + 2e- 2Cl-     εo = + 1.36 V
Br2 + 2e- → 2Br-   εo = + 1.09 V ;    I2 + 2e-  → 2I-    εo = + 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.

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