A-LevelChemistryNitrogen and sulfur9701/12 · Oct/Nov 2012 · Q161 Mark
In a car engine, non-metallic element X forms a pollutant oxide Y. Y can be further oxidised to Z. Two students made the following statements. Student P: The molecule of Y contains lone pairs of electrons. Student Q: The oxidation number of X increases by 1 from Y to Z. X could be carbon or nitrogen or sulfur. Which student could be correct if X were any of these elements?
AP only
BQ only
Cboth P and Q
Dneither P nor Q
✓ Correct answer
A: P only
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