Hybridisation in CH_3, + C H_3 and C _3 are respectively

$\dot{\mathrm{C}} \mathrm{H}_3$ (methyl free radical) has planar structure with $s p^2$ hybridisation of ' $\mathrm{C}$ ' atom. The odd electron is present in unhybridised $2 p_z$ orbital. $\oplus \mathrm{CH}_3$ (methyl carbonium ion) has also trigonal planar structure \left(s p^2\right)$.$\stackrel{\ominus}{\mathrm{CH}_3}$(methyl carbanion) has tetrahedral structure \left(s p^3\right)$ and one of the hybrid orbitals contains the lone pair of electrons.