Identify the incorrect statements about group 15 elements :
(A) Dinitrogen is a diatomic gas which acts like an inert gas at room temperature.
(B) The common oxidation states of these elements are and +5 .
(C) Nitrogen has unique ability to form multiple bonds.
(D) The stability of +5 oxidation states increases down the group.
(E) Nitrogen shows a maximum covalency of 6 .
Choose the correct answer from the options given below.
(A) Dinitrogen is a diatomic gas which acts like an inert gas at room temperature.
(B) The common oxidation states of these elements are and +5 .
(C) Nitrogen has unique ability to form multiple bonds.
(D) The stability of +5 oxidation states increases down the group.
(E) Nitrogen shows a maximum covalency of 6 .
Choose the correct answer from the options given below.
- (A)(A), (B), (D) only
- (B)(A), (C), (E) only
- (C)(B), (D), (E) only
- (D)(D) and (E) only✓ Correct
Answer: (D)
Solution
(A) True — is kinetically inert at room temperature due to its strong triple bond.
(B) True — group 15 elements show oxidation states.
(C) True — nitrogen's small size lets it form strong – multiple bonds, unique in the group.
(D) False — the +5 state's stability *decreases* down the group (inert-pair effect makes +3 more stable for heavier members).
(E) False — nitrogen has no accessible d-orbitals, so its maximum covalency is 4, not 6.
Incorrect statements: (D) and (E) only.
(B) True — group 15 elements show oxidation states.
(C) True — nitrogen's small size lets it form strong – multiple bonds, unique in the group.
(D) False — the +5 state's stability *decreases* down the group (inert-pair effect makes +3 more stable for heavier members).
(E) False — nitrogen has no accessible d-orbitals, so its maximum covalency is 4, not 6.
Incorrect statements: (D) and (E) only.
JEE Main · 2024 · 08 Apr 2024 · Shift 2 · Single correct option