Igcse Model Questions Vol1 2024 Chemistry Question 39

Practice objective / multiple choice question 39 from the 2024 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2024 Chemistry Objective / Multiple Choice Medium Difficulty
Question 39 IGCSE_MODEL_QUESTIONS_VOL1 • 2024 • CHEMISTRY • objective
Igcse Model Questions Vol1 2024 Chemistry Question 39 diagram

The diagram shows the Lewis structure of the nitrate ion (NO₃⁻). Calculate the formal charge on the nitrogen atom and on each oxygen atom. Based on the formal charges, identify which resonance structures are the most significant contributors to the resonance hybrid.

Answer Options

A. N: 0; double‑bonded O: -1; each single‑bonded O: -1. The three equivalent structures with one N=O double bond and two N-O⁻ single bonds are the major contributors.
B. N: +1; double‑bonded O: -1; each single‑bonded O: 0. The three equivalent structures with one N=O double bond and two N-O⁻ single bonds are the major contributors.
Correct Answer C. N: +1; double‑bonded O: 0; each single‑bonded O: -1. The three equivalent structures with one N=O double bond and two N-O⁻ single bonds are the major contributors.
D. N: +2; double‑bonded O: -1; each single‑bonded O: 0. The two structures with two N=O double bonds are the major contributors.
Correct Answer
C
Correct Option:
N: +1; double‑bonded O: 0; each single‑bonded O: -1. The three equivalent structures with one N=O double bond and two N-O⁻ single bonds are the major contributors.

About This Question

This is Igcse Model Questions Vol1 2024 Chemistry Question 39. It is one of the objective questions from the 2024 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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