Q. It is because of inability of ns2 electrons of the valence shell to participate in bonding that :
Answer of this question "It is because of inability of ns2 electrons of the valence shell to participate in bonding that :", here are 4 choices for this question : Sn2 is reducing while Pb2+ is oxidizing, Sn2 and oxidising Pb4+ is reducing , Sn2 and Pb2+ are both oxidising and reducing, Sn4+ is reducing while Pb4+ is oxidising. Answer Is "Sn2 is reducing while Pb2+ is oxidizing".