The central atom in a molecule is in $sp^2$ hybrid state. The shape of the molecule will be

Total number of species from the following with central atom utilising $sp^2$ hybrid orbitals for bonding is.................... $NH_3, SO_2, SiO_2, BeCl_2, C_2H_2, C_2H_4, BCl_3, HCHO, C_6H_6, BF_3, C_2H_4Cl_2$

What is meant by hybridisation? The compound $CH_2 = C = CH_2$ contains $sp$ and $sp^2$ hybridised carbon atoms. Will it be a planar molecule?

What is the type of chemical covalent bond between the carbon-carbon atoms in $C_2H_4$?

How many of the following species have $sp^3$ hybridisation of the central atom?
$SO_3$ (Solid),$H_3PO_2$,$S_2O_3^{2-}$,$XeO_2F_2$,$I_3^-$,$N_2O$,$NH_2^-$

Identify the molecule from the following that does $NOT$ involve $sp^3$ hybridisation.