WAEC - Chemistry (2000 - No. 14)
Which of the following gases is colourless, odourless and soluble in potassium hydroxide solution?
NO 2
SO 2
NH 3
CO2
הֶסבֵּר
CO2 (carbon dioxide) is a colorless and odourless gas and very soluble in KOH owning that it is an acidic gas.