Question

Two solutions 'A' and 'B' have pH value 3.0 and 10.5 respectively. Which of these will turn
a Blue litmus solution to red,
b. Phenolphthalein from colourless to pink? Justify your answer in each case.​

Answer 1

a. Solution A turns Blue litmus solution to red, because it's pH is less than 7 which means it's acidic.

b. Solution B turns Phenolphthalein from colourless to pink because it's pH is more than 7 which means it's basic.