Solution:
The above statement is true.If we add some drops of phenolphthalein solution in pure water, it becomes colourless.
In general, pure water has a pH of 7 at . Phenolphthalein is colourless at pH 7 and only starts to become pink at a pH of approximately 9 and higher. It is slightly soluble in water and usually it is dissolved in alcohols for use in experiments. Phenolphthalein is a weak acid, which can lose ions in solution. Therefore, if we add some drops of phenolphthalein solution to pure water, it becomes colourless.
