Multiple choice general knowledge

Tetraethyl lead is used as

  1. mosquito repellent

  2. pain killer

  3. fire extinguisher

  4. petrol additive

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

Tetraethyl lead was used as an additive in petrol (gasoline) to improve engine performance by preventing knocking. It was phased out due to its toxicity and environmental pollution, replaced by unleaded petrol alternatives.