Which natural indicator can be used to test the acidity or basicity of substances?

What color does litmus paper turn when it is in contact with water?

Which of the following substances turns red litmus paper blue?

What color does bromothymol blue turn when it comes in contact with an acidic substance?

What happens when purple cabbage juice is mixed with a base?

What color does phenolphthalein turn when it is in contact with a basic substance?

What color does blue litmus paper turn when it interacts with a basic substance?

Which substance would turn Litmus paper from blue to red?

What would happen if you mix lemon juice, a natural indicator, with a base?

What color does turmeric turn when it comes in contact with a basic mixture?