Multiple choice

Tetraethyl lead (TEL) is added to petrol to

  1. prevent freezing

  2. increase boiling point

  3. increase flash point

  4. increase anti knocking rating

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tetraethyl lead was historically added to gasoline as an anti-knock agent to prevent premature detonation (knocking) in internal combustion engines.