question_answer

Two solutions A and B have pH values of 3.0 and 10.5 respectively. Which of these will turn:

(i) Blue litmus solution to red and

(ii) Phenolphthalein from colourless to pink?

Justify your answer in each case.

Answer:

(i) Solution A will turn blue litmus red as it has pH 3 which is acidic in nature.

(ii) Solution B will turn phenophthalein from colourless to pink as it is basic in nature having pH 10.5.