Which of the following molecules is non-polar?

Which of the following combinations of atomic orbitals shown in the figure results in a sigma bond?

What is the hybridization of the oxygen atom in ethanol?

What is the hybridization of the carbon atom in methanal?

How many sigma and pi bonds are present in a molecule of propyne, ${\mathrm{H}}_3\mathrm{CCCH}$?

Deduce the electron-domain geometry of ${\mathrm{CCl}}_4, {\mathrm{NH}}_3$ and ${\mathrm{CS}}_2$.

Deduce the molecular geometry of ${\mathrm{CCl}}_4, {\mathrm{NH}}_3$ and ${\mathrm{CS}}_2$.

Deduce the bond angle in ${\mathrm{CCl}}_4, {\mathrm{NH}}_3$ and ${\mathrm{CS}}_2$.

Deduce the hybridization state of the central atom in ${\mathrm{CCl}}_4, {\mathrm{NH}}_3$ and ${\mathrm{CS}}_2$.