Standard reduction potentials of the half reactions are given below F 2 ( g ) + 2 e − ⟶ 2 F − ( a q ) ; Cl 2 ( g ) + 2 e − ⟶ 2 Cl − ( a q ) ; Br 2 ( l ) + 2 e − ⟶ 2 Br − ( a q ) ; I 2 ( s ) +

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Standard reduction potentials of the half reactions are given below F 2 ​ ( g ) + 2 e − ⟶ 2 F − ( a q ) ; Cl 2 ​ ( g ) + 2 e − ⟶ 2 Cl − ( a q ) ; Br 2 ​ ( l ) + 2 e − ⟶ 2 Br − ( a q ) ; I 2 ​ ( s ) + 2 e − ⟶ 2 I − ( a q ) ; ​ E ∘ = + 2.85 V E ∘ = + 1.36 V E ∘ = + 1.06 V E ∘ = + 0.53 V ​ The strongest oxidising and reducing agents respectively areNEET 2012 (Mains)

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Higher the value of standard reduction potential, stronger will be the oxidising agent. Therefore, F 2 ​ will act as strongest oxidising agent. Similarly lower the value of standard reduction potential, stronger will be the reducing agent. Therefore, I − will act as strongest reducing agent.

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