Question

All acidic gases are colourless.

• A. True
• B. False

Answer 1

The correct option is B False

Acid gases are any gaseous compounds that form an acidic solution when dissolved in water. Example: Hydrogen sulfide ($H_{2}S$), hydrogen halides ($HCl,HF,HBr$), sulfur oxides ($S{O}_2$ and $S{O}_3$), nitrogen oxides ($N{O}_x$), carbon dioxide ($C{O}_2$) etc.
But all are not colourless.

Example: Nitrogen dioxide is a deep red-orange gas.
statement is false.