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Question

What is the octane number of triptane?

A
45
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B
25
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C
100
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D
125
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Solution

The correct option is D 125
Octane number is the percentage by volume of iso-octane present in a mixture of iso-octane and heptane which has the same knocking performance as the sample fuel. For eg - octane number of triptane is 125. Hence, the answer is D.

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