Igcse Model Questions Vol1 2017 Chemistry Question 24

Practice objective / multiple choice question 24 from the 2017 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2017 Chemistry Objective / Multiple Choice Medium Difficulty
Question 24 IGCSE_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • objective
Igcse Model Questions Vol1 2017 Chemistry Question 24 diagram

The diagram shows the Lewis structure of the nitrate ion (NO₃⁻) with one N=O double bond and two N-O single bonds. Using this structure, (a) calculate the formal charge on the nitrogen atom and on each oxygen atom, (b) state the hybridisation of the nitrogen atom, and (c) give the average bond order of the N-O bonds.

Answer Options

A. N: 0; double‑bond O: -1; each single‑bond O: -1; N is sp² hybridised; average N-O bond order = 1.00
Correct Answer B. N: +1; double‑bond O: 0; each single‑bond O: -1; N is sp³ hybridised; average N-O bond order = 1.33
C. N: -1; double‑bond O: +1; each single‑bond O: 0; N is sp³d hybridised; average N-O bond order = 1.25
D. N: +2; double‑bond O: +1; each single‑bond O: -2; N is sp hybridised; average N-O bond order = 1.50
Correct Answer
B
Correct Option:
N: +1; double‑bond O: 0; each single‑bond O: -1; N is sp³ hybridised; average N-O bond order = 1.33

About This Question

This is Igcse Model Questions Vol1 2017 Chemistry Question 24. It is one of the objective questions from the 2017 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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