A-LevelChemistryNitrogen and sulfurFeb/Mar 2019Paper 1 Q191 Mark
Ammonia, NH₃, and hydrazine, NH₂NH₂, are two compounds of nitrogen, N₂. Which statement is correct?
AThe N-N bond in NH₂NH₂ is polar.
BNH₃ and NH₂NH₂ have lone pairs of electrons but N₂ does not.
CThe oxidation number of each nitrogen in NH₂NH₂ is +2.
DThe reaction of nitrogen with hydrogen has a high activation energy.
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The correct answer is D. This question tests the candidate's understanding of nitrogen and sulfur within the Chemistrysyllabus. The examiner's mark scheme requires...
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