18. Which of the following is used to increase the anti-knocking property of petrol ? A.Tetramethyl lead B.Tetraethyl lead C.Trimethyl lead D.Triethyl lead
Answer: Option B Solution: An anti-knocking agent is the substance which is used to reduce the engine knocking. It increases the octane number of the fuel. It helps in auto-ignition by raising the temperature and pressure. TEL is tetraethyl Lead which is used as an anti-knocking compound.
