Total number of vacant orbitals in the valence shell of sulphur when it undergoes the formation of $SF_4$.

Which is the correct statement?
As the $s$-character of a hybrid orbital decreases:
$(I)$ The bond angle decreases
$(II)$ The bond strength increases
$(III)$ The bond length increases
$(IV)$ Size of orbitals increases

The hybridisation of xenon atom in $XeF_4$ is

Identify the molecules which have $sp$-hybridised carbon$(s)$ from the list given below:
$I$. Ethane nitrile $(CH_3CN)$
$II$. Buta$-1,3-$diene $(CH_2=CH-CH=CH_2)$
$III$. Propan$-1,2-$diene $(CH_2=C=CH_2)$
$IV$. Ethyne $(HC \equiv CH)$
$V$. Benzene $(C_6H_6)$

$sp^3$ hybridization leads to which shape of the molecule?

In which of the following molecules does the central atom use $sp^2$ hybrid orbitals to form covalent bonds?