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:What is the colour of phenolphthalein indicator in a…The colour of phenolphthalein indicator in alkaline…Three drops of a 1.0 mol dm−³ solution of NaOH are…Three drops of a 1.0 mol/dm³ solution of HCl was…An aqueous solution is acidic if?