Statement-I : `PCl_(5) "and" PbCl_(4)` are thermally unstable.
Statement-II : They produce same gas on thermal decomposition

Options

A. If both statement -I & Statement-II are true & the Statement-II is correct explaination of the statement-I.
B. If both Statement-I & Statement-II are true but Statement-II is not a correct explainatin of Statement-I.
C. If Statement-I is True but the Statement-II is False
D. If the Statement-I is False but the Statement-II is True

Answer

B

Explanation

`PCl_(5)overset(triangle)toPCl_(3)+Cl_(2)`
`PCl_(5) "decomposes into" PCl_(3) "&" Cl_(2)` as in its structure two `P-Cl` axial bonds are longer than other three `p-Cl` equatorial bonds.
`PbCl_(4)overset(triangle)toPbCl_(2)+Cl_(2)`
Due to inert pair effect, `Pb^(4+)` is unstable therefore it changes into more stable `Pb^(++)`