Question

5. On adding concentrated NaOH solution to a test tube containing phenolphthalein, the colour change observed by a student would be
(a) pink to colourless.
(b) pink to blue.
(c) colourless to pink.
(d) red to blue.

6. Which of the following is a strong acid?
(a) Lactic acid
(b) Ascorbic acid
(c) Formic acid
(d) Sulphuric acid​

Answer 1

Answer:

5 . pink to colour less

6.sulphuric acid

Answer 2

5. {C} colourless to pink

6. {D} sulphuric acid