Question

8. What is an indicator? Name the indicator (A and B) used in the following cases
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Answer 1

Answer:

Indicator is a liquid which is used to measure that whether water is acidic or basic.

Answer 2

Answer:

Explanation:

Indicators are substances which show a change in color when brought in contact with acids and bases.

The most common indicator used in the laboratory is the litmus. It is extracted from lichens and is available either in the form of solutions or in the form of strips of paper known as litmus paper. Litmus paper is either red or blue in color. It changes color depending upon whether the compound is an acid or a base. Blue litmus paper turns red under acidic conditions, and red litmus paper turns blue under basic conditions.

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The solutions that do not show change in color in any of the indicators are neither acidic nor basic. These substances, as you already know, are called neutral substances.  

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