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Calculate the octane number of gasoline fuel, which contains 25%   n-heptane and 75 % is iso-octane .

Options

  1. A25
  2. B50
  3. C75
  4. D100

Correct answer

C. 75

Step-by-step solution

Octane number is defined as the percentage by volume of iso-octane present in the mixture of i s o - o c tan ⁡ e and n - h e p tan ⁡ e 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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