Multiple choice

Which of the following substances is not produced when coal is burnt in air?

  1. CO2

  2. H2

  3. Light

  4. Heat

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

Coal combustion produces carbon dioxide (CO₂) from the carbon content, and releases heat and light energy. Hydrogen gas (H₂) is not a direct product of coal burning; the hydrogen in coal combines with oxygen to form water vapor (H₂O), not hydrogen gas.

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