Q. Which compound is used for increase of octane rating?
a) Tetraethyllead
b) Tetramethyl Oxide
c) Trimethyl hexane
d) Triethyl toluene
Correct Answer :
Question from BPSC PT 71, 2025
Correct Answer: a) Tetraethyllead
Explanation:
Octane rating measures a fuel’s resistance to knocking in engines. Tetraethyllead (TEL) was historically added to gasoline as an anti-knock agent to significantly increase the octane number. The other options are not standard octane-boosting additives. (Note: TEL use has been phased out in most countries due to toxicity and environmental concerns.)
