Standard reduction potentials of the half reactions are given below:
F2(g) + 2e- 2F-(aq) ; Eo = +2.85 V
Cl2(g) + 2e- 2Cl-(aq); Eo = +1.36 V
Br2(I) + 2e- 2Br- (aq); Eo = +1.06 V
I2(s) + 2e- 2I- (aq) ; Eo = +0.53 V
The strongest oxidizing and reducing agents respectively are:
Br2 and Cl-
Cl2 and Br-
Cl2 and I2
F2 and I-
more negative the value of reduction potential, stronger will be the reducing agent thus I- is the strongest agent more positive value of reduction potential shows good oxidising properties thus oxidising agent is F2
Option 1)
Br2 and Cl-
this option is incorrect.
Option 2)
Cl2 and Br-
this option is incorrect.
Option 3)
Cl2 and I2
this option is incorrect.
Option 4)
F2 and I-
this option is correct.