Inside a car engine, the non-metal element X produces a pollutant oxide Y. Y may then be oxidised further to Z. Student P: The Y molecule has lone pairs of electrons. Student Q: From Y to Z, the oxidation number of X rises by 1. X could be carbon or nitrogen or sulfur. Which student could be correct if X were one of these elements?
- AP only
- BQ only
- Cboth P and Q
- Dneither P nor Q