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In commercial gasolines the type of hydrocarbons which are more desirable, is

1. Branched hydrocarbons
2. Straight-chain hydrocarbons
3. Aromatic hydrocarbons such as toluene
4. Linear unsaturated hydrocarbons

Correct answer: Branched hydrocarbons

Solution

Branched hydrocarbons are more desirable in commercial gasolines because they have higher octane numbers, which improve engine performance and reduce knocking.

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