Multiple choice

To avoid 'Knocking' of the engine of a car, certain compounds are added to petrol. Which of the following is known as an anti - knocking agent?

  1. Ethyl Alchol

  2. Propane

  3. Methane

  4. Tetraethyl lead
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tetraethyl lead (TEL) was historically added to gasoline as an anti-knocking agent to prevent premature fuel combustion in engine cylinders. It increases octane rating and allows smoother engine performance. Though now phased out due to environmental concerns, it was the standard anti-knock additive for decades.

Keep practicing — related questions