The linear shape of $CO_2$ is due to

What is the $CORRECT$ geometry and hybridisation for $SF_4$?

Consider $PF_{5}$,$BrF_{5}$,$PCl_{3}$,$SF_{6}$,$[ICl_{4}]^{-}$,$ClF_{3}$ and $IF_{5}$.
Amongst the above molecule$(s)$/ion$(s)$,the number of molecule$(s)$/ion$(s)$ having $sp^{3}d^{2}$ hybridisation is $........$

What type of hybridisation results in tetrahedral geometry?

What is the type of hybridization in $ICl_7$?

As the $s$-character of a hybrid orbital increases,the bond angle