Which hybridisation is presumed for $\mathrm{P}$ in${\mathrm{PF}}_3$ and $\mathrm{S}$ in ${\mathrm{SF}}_6$? Give reason for your answer.

Sketch the shapes of molecular orbitals formed by the overlap of two s-orbitals. Name the orbitals formed in each case. 

Sketch the shapes of molecular orbitals formed by the overlap of side by side overlap of two p-orbitals. Name the orbitals formed.

Sketch the shape of molecular orbital formed by the overlap of side on overlap of two p-orbitals. Name the orbitals formed.