Question
$$Pb{F_4},PbC{l_4}$$ exist but $$PbB{r_4}$$ and $$Pb{I_4}$$ do not exist because of
A.
large size of $$B{r^ - }$$ and $${I^ - }$$
B.
strong oxidising character of $$P{b^{4 + }}$$
C.
strong reducing character of $$P{b^{4 + }}$$
D.
low electronegativity of $$B{r^ - }$$ and $${I^ - }.$$
Answer :
strong oxidising character of $$P{b^{4 + }}$$
Solution :
$$F$$ and $$Cl$$ are more oxidising in nature and can achieve $$Pb$$ in $$\left( {IV} \right)O.S.$$ but $$B{r_2}$$ and $${I_2}$$ can not achieve $$Pb$$ in $$\left( {IV} \right)O.S.$$ secondly $$P{b^{4 + }}$$ is strong in oxidising nature and in its presence, $$B{r^ - }$$ and $${I^ - }$$ can not exist.