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Tetraethyl lead is used as

  • A.Pain killer
  • B.Fire extinguisher
  • C.Mosquito repellent
  • D.Petrol additive

Answer: D

Tetraethyl lead was used as a petrol additive, raising the octane rating and preventing engine knock.

It was phased out worldwide because the lead in the exhaust is a cumulative poison that damages the nervous system, especially in children. India completed the switch to unleaded petrol in 2000.

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