Multiple choice

Tetraethyl lead (TEL) is added to petrol to

  1. increase boiling point

  2. prevent freezing

  3. increase anti-knocking rating

  4. increase flash point

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

Tetraethyl lead (TEL) is extensively used as an additive to gasoline, wherein it served as an effective antiknock agent and prevented exhaust valve and seatwear.