If the octane number of a sample of petrol is | vedclass

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Question

(C) The octane number of a fuel is defined as the percentage by volume of isooctane ($2,2,4$-trimethylpentane) in a mixture of isooctane and $n$-hepta

Vedclass · Accepted Answer

$60\% \ n$-heptane and $40\%$ isooctane

Vedclass · Answer

(C) The octane number of a fuel is defined as the percentage by volume of isooctane ($2,2,4$-trimethylpentane) in a mixture of isooctane and $n$-heptane that has the same knocking characteristics as the fuel being tested.Since the octane number is $40$,it means the mixture contains $40\%$ isooctane and $(100 - 40) = 60\% \ n$-heptane by volume.Therefore,the correct composition is $60\% \ n$-heptane and $40\%$ isooctane.

If the octane number of a sample of petrol is $40$,it is a mixture of........and............

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