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Why can unsaturated hydrocarbons give a more sooty flame?

Answer and explanation

Correct answer: Because they may have higher carbon proportion and combustion can be incomplete

Soot consists mainly of tiny unburnt carbon particles. Unsaturated hydrocarbons contain carbon-carbon double or triple bonds and often have a relatively higher carbon proportion than saturated compounds with comparable hydrogen content. If oxygen is insufficient or mixing is poor, combustion is incomplete; carbon particles then remain incandescent and produce a yellow, smoky, sooty flame. The other options contradict the composition of hydrocarbons or combustion chemistry.

Related tags

Unsaturated HydrocarbonsSooty FlameIncomplete CombustionCarbonHydrocarbonsCarbon And Its CompoundsScienceClass 10 Mcq

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