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Which of the following is not true?

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By Expert Faculty of Sri Chaitanya
a
Petrol containing a larger amount of straight-chain hydrocarbons produces less knocking
b
Petrol containing a larger amount of branched-chain hydrocarbons produces less knocking
c
Octane rating is zero for n-heptane
d
Octane rating is 100 for isooctane

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detailed solution

Correct option is A

No, Petrol containing a larger amount of straight-chain hydrocarbons produces higher knocking( Sharp noises are produced when some of the compressed air-fuel combination in the cylinder burns prematurely. )


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