Multiple choice

Which of the following substances does not burn by producing a flame?

  1. Biogas

  2. Camphor

  3. Magnesium

  4. Mustard oil

  5. Charcoal

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

This is the correct option as charcoal does not burn by producing a flame. It is a solid fuel that does not vapourise on heating. It only glows on combustion.