What will be the effect on the colour of blue litmus paper when it is dropped in each of the following solution. 1. Water 2. Lime juice 3. Dilute hydrochloric acid 4. Sodium hydroxide solution.

Answer 1

first, decide which are acids, and which are bases.

Then, what does the litmus paper do in each case?

Answer 2

What will be the effect on the colour of blue litmus paper when it is dropped in sodium hydrogen solution