p -Block elements - ll — Chemistry STD 12 Science — Question

Where $A$ is $PCl^+_4$ while $B$ is $PCl^-_ 6$

Which of the following statement is INCORRECT :

$(I)$ $B$ to $A$ involvement of number of $d-$orbital in hybridization increases

$(II)$ $A$ to $B$ precentage of $p-$character in $P-Cl$ bond increases

$(III) $ Number of covalent bond in $A$ and $B$ are same

$(IV)$ $B$ is product of Lewis acid-base interaction which is associated with super octet molecule only

Given : $AB$ is $100\%$ ionised at boiling point of the solution, ($K_b / K_f $) water $= 0.3$

$Cr _{2} O _{7}^{2-}+14 H ^{+}+6 e ^{-} \rightarrow 2 Cr ^{3+}+7 H _{2} O$

The amount of $Cr ^{3+}$ obtained was $0.104\, g$. The

efficiency of the process(in\%) is

(Take : $F =96000\, C$, At. mass of chromium $=52$ )

$[Figure]$   $\xrightarrow[{{\text{AlC}}{{\text{l}}_3}}]{{{\text{Succinic anhydride}}}}A\xrightarrow[{{\text{reduction}}}]{{{\text{Clemmenson 's}}}}X$ is