JEE Previous Year Question

Total number of species from the following with central atom utilising ${\text{sp}}^2$ hybrid orbitals for bonding is_____ ${\text{NH}}_3\text{,}{\text{SO}}_2\text{,}{\text{SiO}}_2\text{,}{\text{BeCl}}_2\text{,}{C}_2{H}_2\text{,}{C}_2{H}_4\text{,}{\text{BCl}}_3\text{,}\text{HCHO}\text{,}{C}_6{H}_6\text{,}{\text{BF}}_3\text{,}{C}_2{H}_4{\text{Cl}}_2$

Topic: JEE PYQ

Answer: 6. Full step-by-step solution below.