Question 18
Petroleum and CoalA compound used as an 'anti-knock' in automobile engines is
- A.Glycerol
- B.n-heptane
- C.lead tetra-ethyl
- D.Tetramethylsilane
Show the answer and explanation
Answer: C (lead tetra-ethyl)
Explanation
Tetraethyl lead was added to petrol to stop knocking (n-heptane actually causes knocking).