Identify the incorrect statement from the following:
- Phosphorus, arsenic and antimony show catenation property.
- P(C2H5)3 and As(C6H5)3 form dπ–dπ bond with transition metals.
- Nitrogen can form dπ–pπ bond with oxygen.
- Nitrogen can form pπ–pπ multiple bonds with itself.
Answer
(3) Nitrogen can form dπ–pπ bond with oxygen.
Solution
As per NCERT (anomalous behaviour of nitrogen):
(4) Nitrogen forms pπ–pπ multiple bonds with itself (N≡N) — correct.
(2) Heavier elements can use d orbitals: P(C2H5)3 and As(C6H5)3 form dπ–dπ bonds with transition metals — correct.
(1) Phosphorus, arsenic and antimony show catenation (weaker than carbon) — correct.
(3) Nitrogen has no d orbitals in its valence shell (n = 2), so it cannot form dπ–pπ bonds with oxygen — incorrect.
Answer: (3)