Ethene decolourises acidified potassium tetraoxomanganate(VII) solution. Which gas will decolourise bromine water? By: Sunday|Published on: Apr 19|Categories: Chemistry NECO| 0 comments A. CH4 B. C2H6 C. C3H6 D. C3H8 E. C6H6 Correct Answer: Option C – C3H6 Users Also Read These:The salt that reacts with dilute hydrochloric acid…What technique is suitable for separating a binary…An organic compound reacted with bromine water to…When bromine is added to ethene at room temperature,…The colour of the solution formed when ethyne reacts…SEE ALSO An organic compound gave the following results on analysis: C = 29.3% ; H = 5.7%; Br = 65%.