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CSS Solved Papers
Physics Chemistry

Engineering :: Heat Engines

  A fuel of octane rating 85 matches the antiknock qualities of mixture consisting of
[A]. 85% petrol + 15% diesel[B]. 15% petrol + 85% diesel
[C]. 85% benzene + 15% methyl alcohol[D]. 85% heptane + 15% octane
[E]. 85% octane + 15% heptane    

Answer: Option E
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