Question

Two samples of colourless transparent liquids are given to you in two
separate test tubes marked A and B. One test tube contains hydrochloric
acid and the other contains distilled water. Using a pH paper, how would
you recognise the two samples?

Answer 1

Answer:

as we know acid turns into blue litmus paper so, hydrochloric acid turns ph paper into blue

Answer 2

we know the acid change the ph paper into blue color .because hydrochloric is acidic nature and water is acidic or basic nature