Igcse Model Questions Vol1 2019 Chemistry Question 29

Practice objective / multiple choice question 29 from the 2019 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2019 Chemistry Objective / Multiple Choice Medium Difficulty
Question 29 IGCSE_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • objective
Igcse Model Questions Vol1 2019 Chemistry Question 29 diagram

The diagram shows the Lewis structure of the nitrate ion \(\mathrm{NO_3^-}\) with one double bond between nitrogen and an oxygen atom and single bonds to the other two oxygen atoms. Using this structure, determine (a) the total number of valence electrons present in the ion, (b) the formal charge on the nitrogen atom, and (c) the number of resonance structures possible for \(\mathrm{NO_3^-}\).

Answer Options

A. a) 24 electrons; b) 0; c) 3 resonance structures
Correct Answer B. a) 24 electrons; b) +1; c) 3 resonance structures
C. a) 22 electrons; b) 0; c) 2 resonance structures
D. a) 26 electrons; b) +2; c) 4 resonance structures
Correct Answer
B
Correct Option:
a) 24 electrons; b) +1; c) 3 resonance structures

About This Question

This is Igcse Model Questions Vol1 2019 Chemistry Question 29. It is one of the objective questions from the 2019 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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