Question

Antinocking agent added to petrol is commonly

• A. Tetramethyl or tetraethyl lead
• B. Dibromoethane
• C. Both A and B
• D. Octane

Answer 1

Answer: (C)

Both A and B

Antiknocking agents are the chemical derivatives that are added to petrol. These agents increase the octane number of petrol due to which the pressure and temperature of petrol increases and so these protect petrol from detonation at low pressure. This is done to maintain the quality of the engines. Tetramethyl or tetraethyl lead, dibromoethane, benzole toluene are used as the antiknocking agents.

Hence, the correct answer is 'Both A and B'.