Multiple choice

A yellow sooty flame with lots of smoke is produced by

  1. saturated hydrocarbons.

  2. ethyne.

  3. liquefied petroleum gas.

  4. butane.

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Unsaturated hydrocarbons with a high carbon-to-hydrogen ratio, such as ethyne (acetylene), burn with a yellow sooty flame due to incomplete combustion.