Account for the following: (i) PbX_(2) is more stable than PbX_(4) (X = Cl, Br) (ii) PbCl_(4) is more stable than SnCl_(4) but PbCl_(2) is more stable than SnCl_(2), (iii) PbCl_(4) is less stablethan SnCl_(4) ?

Account for the following: (i) PbX_(2) is more stable than PbX_(4) (X

1.	Account for the following: (i) PbX_(2) is more stable than PbX_(4) (X = Cl, Br) (ii) PbCl_(4) is more stable than SnCl_(4) but PbCl_(2) is more stable than SnCl_(2), (iii) PbCl_(4) is less stablethan SnCl_(4) ?
Answer» Solution :(i) DUE to inert pair effect, the +2 OXIDATIONSTATE of Pb is more stablethan `+4`. Hence, `PbX_(2)` is more stable than `PbX_(4)`. (ii) STABILITY of `+4` oxidationstate decreases down the groupwhile that of `+2`oxidationstate increases due to inert pair effect. (iii) Same as (ii).