Question

What pH values can a universal indicator detect?

• A. 0-7
• B. 0-14
• C. 4-10
• D. 7-14

Answer 1

The correct option is B

0-14

A universal indicator is a mixture of pH indicators which change colour according to the acidic or basic nature of the solution into which they are added. They can form a continuous spectrum of colours that give an approximate reading of concentration of $H^{+}$ ions in the sample. Methyl red, phenolphthalein and thymol blue are few examples of universal indicators.