The ammonium ion $(NH_4^+)$ is:

Hybridisation states of $C$ in $CH_3^+$ and $CH_4$ are

Give examples of hybridization involving $s$,$p$,and $d$ orbitals.

On what factor does the direction of a bond around the central atom depend?

The hybridisation of the central atom of $BF_3$,$SnCl_2$,and $HgCl_2$ respectively is:

Assertion : Among the carbon allotropes,diamond is an insulator,whereas,graphite is a good conductor of electricity.
Reason : Hybridization of carbon in diamond and graphite are $sp^3$ and $sp^2$,respectively.