The $H-C-H$ bond angle in $CH_4$ molecule is

Among $SO_2, NF_3, NH_3, XeF_2, ClF_3$ and $SF_4$,the hybridization of the molecule with non$-zero$ dipole moment and highest number of lone$-pairs$ of electrons on the central atom is

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

In which of the following hybridizations is the maximum bond angle of $90^\circ$ observed between bond pair-bond pair electrons?

What is the hybridization state of the central atom in the conjugate base of $NH_4^{+}$ ion?

Write the state of hybridisation of carbon in the following compounds and the shapes of each of the molecules:
$(a)$ $H_2C=O$
$(b)$ $CH_3F$
$(c)$ $HC \equiv N$