Question

In the presence of a base, blue litmus paper will .

O turn purple
stay blue
to turn red​

Answer 1

In the presence of a base, blue litmus paper will turn red........

Answer 2

In the presence of a base the blue litmus paper would remain blue.

Step-by-step explanation:

This is because the litmus paper will react depending on the pH of the solution added. If the solution is acidic pH < 7, the litmus paper will turn red. If the solution is basic, pH > 7 the litmus paper will turn blue. If the litmus paper is blue when a base is added it will remain blue.