Which of the following gases is colourless, odourless and soluble in potassium hydroxide solution? by Sunday | May 13 | Chemistry WAEC | 0 comments A. NO2 B. SO2 C. NH3 D. CO2 Correct Answer: Option D D. CO2 Users Also Read These:The hydrolysis of groundnut oil by potassium…When sodium hydroxide solution is added to a…When sodium hydroxide solution is added to a…A solution which on treatment with hydrochloric acid…The colour of the solution formed when ethyne reacts…