Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is ________________?
Correct answer: A. More than 100
- A. More than 100
- B. Round about 100
- C. Between 50 and 100
- D. Less than 25
Explanation
Tetraethyl lead has an antiknock effectiveness corresponding to an octane number above the 100 reference value of iso-octane, so a small amount raises petrol's octane rating.
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