Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are:
A. red and blue
B. blue and red
C. pink and colourless
D. colourless and pink
Answer:D
Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are:
A. red and blue B. blue and red C. pink and colourless D. colourless and pink