The titration curve of weak acid vs. strong base with phenolphthalein as indictor) is shown below. T — JEE Mains Chemistry Past Papers Chemistry Question

Question

The titration curve of weak acid vs. strong base with phenolphthalein as indictor) is shown below. The Kphenolphthalein = 4 x 10–10. Given : log2 = 0.3 The number of following statements which is/are correct about phenolphthalein is ____________ A. It can be used as an indicator for the titration of weak acid with weak base. B. It begins to change colour at pH = 8.4 C. It is a weak organic base D. It is colourless in acidic medium