Question

what is universal indicator for which indicator is used​

Answer 1

Answer:

Universal indicator is a mixture of dyes that changes colour gradually over a range of pH from 4-14. The colour is used to indicate pH directly (1). The main components of a Universal indicator, in the form of a solution, are thymol blue, methyl red, bromothymol blue and phenolphthalein.

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Answer 2

Answer:

pH paper

Explanation:

pH paper have a a wide range of colour patterns through which acidic or basic solution can be indicated or it can be a neutral solution also indicated show the universal indicator that is the pH paper is used as a universal