Neco Model Questions Vol1 2019 Chemistry Question 8

Practice objective / multiple choice question 8 from the 2019 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2019 Chemistry Objective / Multiple Choice Easy Difficulty
Question 8 NECO_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • objective

The nitrate ion, \(\mathrm{NO_3^-}\), is known to exhibit resonance. \n\n(a) How many sigma (\(\sigma\)) bonds are present in \(\mathrm{NO_3^-}\)?\n\n(b) How many pi (\(\pi\)) bonds are effectively present when resonance is taken into account?\n\n(c) What is the overall bond order for each N-O bond in the ion?

Answer Options

A. (a) 4 sigma bonds; (b) 1 delocalised pi bond; (c) bond order = 3/2
Correct Answer B. (a) 3 sigma bonds; (b) 1 delocalised pi bond; (c) bond order = 4/3
C. (a) 2 sigma bonds; (b) 1 delocalised pi bond; (c) bond order = 5/3
D. (a) 3 sigma bonds; (b) 2 pi bonds; (c) bond order = 5/3
Correct Answer
B
Correct Option:
(a) 3 sigma bonds; (b) 1 delocalised pi bond; (c) bond order = 4/3

About This Question

This is Neco Model Questions Vol1 2019 Chemistry Question 8. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Easy .

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