Neco 2022 Chemistry Question 44

Practice objective / multiple choice question 44 from the 2022 Neco Chemistry examination.

Neco 2022 Chemistry Objective / Multiple Choice Hard Difficulty
Question 44 NECO • 2022 • CHEMISTRY • objective

The following nitrogen oxides are given: \(\mathrm{N_2O}\), \(\mathrm{NO}\), \(\mathrm{NO_2}\), and \(\mathrm{N_2O_5}\). (i) Assign the oxidation state of nitrogen in each oxide. (ii) When each oxide reacts with water, the corresponding aqueous species are formed: \(\mathrm{N_2O + H_2O \rightarrow 2NH_3}\), \(\mathrm{NO + H_2O \rightarrow HNO_2}\), \(\mathrm{NO_2 + H_2O \rightarrow HNO_3 + HNO_2}\), \(\mathrm{N_2O_5 + H_2O \rightarrow 2HNO_3}\). Rank the resulting acids from strongest to weakest based on the oxidation state of nitrogen.

Answer Options

Correct Answer A. N oxidation states: N2O +1, NO +2, NO2 +4, N2O5 +5. Acid strength order: HNO3 > HNO3/HNO2 mixture > HNO2 > NH3 (no acid)
B. N oxidation states: N2O +1, NO +2, NO2 +4, N2O5 +5. Acid strength order: NH3 > HNO2 > HNO3/HNO2 mixture > HNO3
C. N oxidation states: N2O +1, NO +2, NO2 +5, N2O5 +6. Acid strength order: HNO3 > HNO2 > HNO3/HNO2 mixture > NH3 (no acid)
D. N oxidation states: N2O -1, NO +1, NO2 +3, N2O5 +4. Acid strength order: HNO2 > HNO3/HNO2 mixture > HNO3 > NH3 (no acid)
Correct Answer
A
Correct Option:
N oxidation states: N2O +1, NO +2, NO2 +4, N2O5 +5. Acid strength order: HNO3 > HNO3/HNO2 mixture > HNO2 > NH3 (no acid)

About This Question

This is Neco 2022 Chemistry Question 44. It is one of the objective questions from the 2022 Neco Chemistry examination.

Difficulty level: Hard .

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