O-LevelChemistryElectrolysis5070/11 · Oct/Nov 2023 · Q191 Mark

In which substance does the nitrogen atom have the same oxidation number as the nitrogen atom in HNO2? Assume the following oxidation numbers for the other elements in these compounds: H, +1; F, -1; O, -2.

ANF3

BNH4+

CNO

DNO2+

✓ Correct answer

A: NF3

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2023 Paper 1 Variant 1, question 19.

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