MCQ
The petrol having octane number $80$ has
- ✓$20\%$ normal heptane + $80\%$ iso-octane
- B$80\%$ normal heptane + $20\%$ iso-octane
- C$20\%$ normal heptane + $80\%$ normal octane
- D$80\%$ normal heptane + $20\%$ normal octane
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