Q. Assertion : in oxidation state is a reducing agent while in state is an oxidising agent.
Reason : Inert pair effect is due to participation of electrons in bond formation.

 2296  220 The p-Block Elements Report Error

Solution:

In heavier elements, the tendency to show oxidation state increases in the sequence . It is due to the inability of electrons of valence shell to participate in bonding (inert pair effect).