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JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkane

  • question_answer
    A fuel contains 25 % n-heptane and 75 % iso-octane. Its octane number is [MP PMT 1993; MP PET 1994]

    A) 50

    B) 75

    C) 100

    D) 25

    Correct Answer: B

    Solution :

               Octane number is the percentage by volume of iso-octane in the mixture of iso-octane and n-heptane which has the same antiknocking properties as the fuel under examination. Given fuel (25% n-heptane +75% iso-octane) Hence, octane number = 75 (because iso octane is 75%)


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