A candle made of wax consists of a blend of hydrocarbons. It is ignited and then put inside a gas jar together with a strip of cobalt(II) chloride test paper, as shown. After a short period, the oxygen in the jar is used up and the candle flame goes out. Which substance is identified by the cobalt(II) chloride paper?
- Acarbon dioxide
- Bcarbon monoxide
- Csulfur dioxide
- Dwater