As the $p-$character increases,the bond angle in hybrid orbitals formed by $s$ and $p$ atomic orbitals

What is the meaning of hybridization of atomic orbitals?

What is the type of hybridization in $SO_3$?

As the $s-$character of a hybridized orbital decreases,the bond angle

Which one of the following has the maximum number of hybrid orbitals?

$A + 2Cl^{-} \rightarrow B$
Where $A$ is $PCl_4^+$ and $B$ is $PCl_6^-$.
Which of the following statements is $INCORRECT$:
$(I)$ From $B$ to $A$,the number of $d$-orbitals involved in hybridization increases.
$(II)$ From $A$ to $B$,the percentage of $p$-character in the $P-Cl$ bond increases.
$(III)$ The number of covalent bonds in $A$ and $B$ are the same.
$(IV)$ $B$ is a product of Lewis acid-base interaction,which is associated with super-octet molecules only.