Question

The main component of a universal indicator, in the form of a solution :

• A. phenolphthalein
• B. thymol blue
• C. methyl red
• D. all of above

Answer 1

The correct option is D all of above

The main components of a universal indicator, in the form of a solution, are thymol blue, methyl red, bromothymol blue and phenolphthalein. This mixture is important because each component loses or gains electrons depending upon the acidity or basicity of the solution being tested.