Multiple choice general knowledge science & technology

Which one of the following is inflammable?

  1. Helium

  2. Nitrogen

  3. Oxygen

  4. Hydrogen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydrogen is highly flammable and burns readily in air to form water. Helium and nitrogen are noble gases that are inert and do not burn. Oxygen supports combustion but is not itself flammable - it is an oxidizer that enables other materials to burn.

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