Question 42
Petroleum and CoalThe efficiency of petrol as a fuel in high-compression internal combustion engines improves with an increase in the amount of
- A.branched chain alkanes
- B.straight chain alkanes
- C.cycloalkanes
- D.halogenated hydrocarbons
Show the answer and explanation
Answer: A (branched chain alkanes)
Explanation
Branched-chain alkanes burn smoothly without knocking, which raises the octane rating of petrol.