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State (Phase) of Alkanes

If octane num...

Question

If octane number of gasoline sample is 70, then this sample will be similar to:

A

70% n-heptane + 30% n-octane

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B

70% n-octane + 30% n-heptane

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C

70% isooctane + 30% n-heptane

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D

70% n-heptane + 30% isooctane

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Solution

The correct option is C 70% isooctane + 30% n-heptane
Octane number = 70 means gasoline contain 70% isoctane for which octane number = 100 and 30% of heptane for which octane number = 0.

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