Question:
The nitrite ion is represented by
(I) [O — N = O]$^-$
(II) [N = O — O]$^-$
Which of the structures represents possible resonance forms of this ion?
The nitrite ion is represented by
(I) [O — N = O]$^-$
(II) [N = O — O]$^-$
Which of the structures represents possible resonance forms of this ion?
(II) [N = O — O]$^-$
Which of the structures represents possible resonance forms of this ion?
Show Hint
Resonance changes electron positions, not atom connectivity.
Updated On: Apr 23, 2026
- Only I
- Only II
- Both I and II
- Neither I and II
Show Solution
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The Correct Option is A
Solution and Explanation
Concept:
Resonance structures must have the same atomic arrangement; only electron distribution changes.
Step 1: In NO$_2^-$, nitrogen is the central atom bonded to two oxygens.
Step 2: Structure (I) maintains correct connectivity (O–N–O).
Step 3: Structure (II) changes connectivity (N not central), hence not a resonance form.
Conclusion:
Only structure (I) is valid.
Step 1: In NO$_2^-$, nitrogen is the central atom bonded to two oxygens.
Step 2: Structure (I) maintains correct connectivity (O–N–O).
Step 3: Structure (II) changes connectivity (N not central), hence not a resonance form.
Conclusion:
Only structure (I) is valid.
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