Which one of the following molecules contains no π bond?

Options

(a) H₂O
(b) SO₂
(c) NO₂
(d) CO₂

Correct Answer:

H₂O

Explanation:

All the molecules have O atom with lone pairs, but in H₂O the H atom has no vacant orbital for pi-bonding. That’s why it does not have any pi-bond. In all other given molecules the central atom because as the presence of vacant orbitals is capable to form pi-bonds.