The hybridization in $PF_3$ is

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

Which molecule is $sp^2$ hybridised?

In the following,which species does not contain $sp^3$ hybridization?

As the $p-$character increases,the bond angle in hybrid orbitals formed by $s$ and $p$ atomic orbitals

The formation of $PCl_3$ is explained on the basis of what hybridization of the phosphorus atom?