Phenolphthalein in acidic solution is? by Sunday | Oct 14 | Chemistry JAMB | 0 comments A. red B. orange C. colourless D. yellow Correct Answer: Option C – colourless Users Also Read These:25cm³ of a 0.2 mol dm³ solution of Na2CO3 requires…The colour of the solution formed when ethyne reacts…What is the colour of phenolphthalein indicator in a…An aqueous solution is acidic if?The colour of phenolphthalein indicator in dilute HNO3 is?