Question

The indicator used to find the pH of a given solution is known as universal indicator because:

• A. it is universally available
• B. it has a universal appearance
• C. it can be used for the entire pH range
• D. None of these

Answer 1

The correct option is C

it can be used for the entire pH range

The explanation for the correct option:

(C) It can be used for the entire pH range

1. A universal indication is a combination of many indicators that produce different colors at various pH levels over the entire scale.
2. While testing it with acids and bases, it changes color.
3. It includes acids with a pH of less than 3 and bases with a pH of more than 11. Therefore, covering the entire range.

Explanation for the incorrect option(s):

(A) it is universally available

Universal indicators help to test acids and bases for different ranges.

(B) it has a universal appearance

There is no specific universal appearance of universal indicators.

Hence, the correct answer is an option (C).