Q.

The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity.         [2025]

1 ESn4+/Sn2+⊝=+1.15 V  
2 EPb4+/Pb2+⊝=+1.67 V  
3 ETl3+/Tl⊝=+1.26 V  
4 EAl3+/Al⊝=-1.66 V  

Ans.

(2)

Specie with highest reduction potential (i.e. highest willingness to get reduced) is strongest oxidizing agent.