Question

colourless gas??????????
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Answer 1

Answer:

Hydrogen , Oxygen,Carbon dioxide etc

Answer 2

Answer:

All the Noble gases are considered to be colorless. Xenon, Argon, Neon, Krypton, Radon, Helium. But remember one thing, they themselves do not poses any color but when they are treated they show some colors.For example, He when it is burned gives out Blue xenon color and when treated with electric current it changes to orange color.

Apart from Noble gases,Hydrogen,oxygen,Nitrogen etc also are colorless.

Explanation:

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