The colour of phenolphthalein indicator in alkaline solution at the end-point of an acid-base titration is? by Sunday | May 8 | Chemistry WAEC | 0 comments A. colourless B. orange C. pink D. yellow Correct Answer: Option A A. colourless Users Also Read These:In a neutralization reaction involving HCI and NaOH…The indicator used in neutralizing CH3COOH and NaOH…What is the colour of phenolphthalein indicator in a…Phenolphthalein in acidic solution is?The colour of methyl orange in alkaline medium is?