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9. Hydricarbon — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry9. Hydricarbon1 Mark
MCQ
Iso-octane is mixed to the petrol
  • A
    To precipitate inorganic substances
  • B
    To prevent freezing of petrol
  • C
    To increase boiling point of petrol
  • ✓
    As an antiknock
✓

Answer

Correct option: D.
As an antiknock
d
One member of the octane family, isooctane, is used as a reference standard to benchmark the tendency of gasoline or $LPG$ fuels to resist self-ignition. For example, gasoline with the same knocking characteristics as a mixture of $90 \,\%$ iso-octane and $10 \,\%$ heptane would have an octane rating of $90$

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