Ethanol is a fuel used in cars. It can be manufactured from petroleum. $\text{C}_4\text{H}_{10} \rightarrow \text{C}_2\text{H}_4 + \text{C}_2\text{H}_6$ (cracking) $\text{C}_2\text{H}_4 + \text{H}_2\text{O} \rightarrow \text{C}_2\text{H}_5\text{OH}$ (producing ethanol) $\text{C}_2\text{H}_5\text{OH} + 3\text{O}_2 \rightarrow 2\text{CO}_2 + 3\text{H}_2\text{O}$ (burning) How many different homologous series are represented by the compounds in these equations?
- A1
- B2
- C3
- D4