In ethene,the bond angle$(s)$ is/are

Which hybrid orbitals are used by carbon atom in the following molecules?
$(a)$ $CH_3-CH_3$
$(b)$ $CH_3-CH=CH_2$
$(c)$ $CH_3-CH_2-OH$
$(d)$ $CH_3-CHO$
$(e)$ $CH_3COOH$

The shape of a molecule depends on which factor?

Identify the pair of molecules in which the central atom has the same hybridization.

Which among the following molecules have $sp^3d$ hybridisation with one lone pair of electrons on the central atom?
$(i)\ SF_4$
$(ii)\ [PCl_4]^+$
$(iii)\ XeO_2F_2$
$(iv)\ ClOF_3$

$X$ and $Y$ are two covalent molecules in which the hybridization of the central atoms is the same,but their shapes are different. $X$ and $Y$ are: