Question
Identify the incorrect statement from the following :
This question was previously asked in
NEET UG Re-Exam 2026 Question Paper (21-Jun-2026)
The correct answer is
Nitrogen can form d$\pi$-p$\pi$ bond with oxygen.
Bonding Properties of N, P, As Analysis
This section identifies the incorrect statement among the given options regarding the chemical bonding characteristics of Nitrogen (N), Phosphorus (P), and Arsenic (As).
Evaluating Chemical Statements
- Statement 1: Nitrogen forms pπ-pπ multiple bonds with itself. This is correct. Nitrogen utilizes its 2p orbitals for strong multiple bonding, like the $N_2$ triple bond ($N \equiv N$).
- Statement 2: $P(C_2H_5)_3$ and $As(C_6H_5)_3$ form dπ-dπ bonds with transition metals. This statement is considered correct. Phosphine ligands can participate in back-bonding involving metal d-orbitals and ligand orbitals, potentially including d-orbitals for P and As.
- Statement 3: Nitrogen forms dπ-pπ bonds with oxygen. This statement is incorrect. Nitrogen (Period 2) lacks accessible d-orbitals essential for dπ bonding. Bonds between N and O, such as in $NO_3^-$, typically involve pπ-pπ interactions.
- Statement 4: Phosphorus, arsenic, and antimony show catenation property. This is correct. These elements can form chains with themselves (e.g., P-P bonds), though the tendency decreases down the group.
Identifying the Incorrect Statement
The statement claiming Nitrogen can form dπ-pπ bonds is chemically inaccurate due to the absence of valence d-orbitals in Nitrogen.
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