What is the colour change observed in dil. HCl solution when phenolphthalein is added to it?
In the fountain experiment, what is the colour change observed when colourless phenolphthalein solution is added to a flask containing ammonia?
Question 10
On adding phenolphthalein indicator to a colourless solution, no change is observed. What is the nature of this solution? (a) Basic (b) Either acidic or basic (c) Either acidic or neutral (d) Either basic or neutral