Which of the following statements accurately describes why saturated hydrocarbons burn with a blue flame, while unsaturated hydrocarbons burn with a yellow, sooty flame?

Subject: General Awareness | Topic: Science | Difficulty: MEDIUM

Options

1. (A) Unsaturated hydrocarbons contain more oxygen, which causes their incomplete combustion.
2. (B) Saturated hydrocarbons have weak bonds, so they burn more completely.
3. (C) Saturated hydrocarbons react with nitrogen present in the air and prevent soot formation.
4. (D) Unsaturated hydrocarbons have a higher carbon-hydrogen ratio, which causes incomplete combustion and soot formation.

Verified Answer

Option (D): Unsaturated hydrocarbons have a higher carbon-hydrogen ratio, which causes incomplete combustion and soot formation.

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