Question

What will be the action of the following substances on blue litmus paper?

Dry HCl gas, Moistened NH₃ gas, Lemon juice, Carbonated soft drink, Curd, Soap solution.

Answer 1

1. Dry HCl gas will have no effect on litmus paper.
2. Moistened NH₃ gas will turn red litmus to blue.
3. Lemon juice will turn blue litmus to red.
4. Carbonated soft drink will turn blue litmus to red.
5. Curd will turn blue litmus to red.
6. Soap solution will turn red litmus to blue.