Multiple choice

A yellow (luminous) flame during combustion is the result of-

  1. Incomplete combustion

  2. Complete combustion

  3. Sufficient oxygen reacting with the fuel

  4. Too much oxygen reacting with the fuel

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

A yellow, luminous flame indicates incomplete combustion, which occurs when there is insufficient oxygen to fully oxidize the fuel, leading to the production of soot.