Question

substance that can turn red litmus paper blue​

Answer 1

Answer:

When red litmus paper comes into contact with any alkaline substance, it turns blue. Some examples of alkaline substances are ammonia gas, milk of magnesia, baking soda and limewater.

Answer 2

Explanation:

ammonia gas, which is alkaline, turns red litmus paper blue. Chemical reactions other than acidbase can also cause a color change to litmus paper.