Multiple choice

What is the colour of middle zone of the flame of candle?

  1. Yellow

  2. Blue

  3. Black

  4. Green

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

The middle zone of a candle flame is called the luminous zone and appears yellow due to incomplete combustion of hydrocarbons. The incomplete combustion produces tiny carbon particles that heat up and glow, giving this zone its characteristic yellow color.