Multiple choice

Why is the flame of L.P.G stove blue in colour?

  1. It is due to incomplete combustion of L.P.G.

  2. It is due to presence of carbon particles.

  3. It is due to presence of dust particles.

  4. It is due to complete combustion of L.P.G.

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

The blue color of an LPG stove flame indicates complete combustion of the fuel, where LPG burns fully to produce carbon dioxide and water vapor. Blue flames are produced when combustion is efficient with minimal soot or unburnt carbon particles, while yellow flames indicate incomplete combustion.