Multiple choice

Which of the following is not an air gas?

  1. Oxygen

  2. Argon

  3. Hydrogen

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

This is not an air gas. This gas is a synthesis gas usually produced from the reaction of calcium carbide with water. Acetylene is a gaseous hydrocarbon. It has a strong garlic odor. The gas is colorless, unstable, highly combustible. Acetylene is used in machine/metal construction for cutting and welding (with oxygen). It is also used in the glass industry for lubrication of bottle production molds.

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