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A substance is tested with litmus paper. The blue litmus paper remains blue while the red litmus paper remains red. What can you conclude about the substance?


The substance is a base.
The substance is neutral; it is neither an acid nor a base.
The substance could be either an acid or a base.
None of the above; it is impossible for both red and blue litmus paper to remain unchanged.

Respuesta :

The substance is fairly neutral. I recommend using ph paper to test that though

Answer: Option (b) is the correct answer.

Explanation:

A substance that is acidic in nature will have pH less than 7 and it will turn blue litmus into red.

Whereas a substance that is basic in nature will have pH more than 7 and it will turn red litmus into blue.

And, a substance that has pH equal to 7 will be neutral in nature and it will not change the color of blue or red litmus paper.

Thus, we can conclude that when a substance is tested with litmus paper. The blue litmus paper remains blue while the red litmus paper remains red. Then it means that the substance is neutral; it is neither an acid nor a base.