Question

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Answer 1

Answer:

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An indicator is a substance which changes color in the presence of acids or alkalis. In the laboratory, we use three indicators. These are litmus, phenolphthalein and methyl orange. Many red or blue colored flowers contain natural dyes which can be used as indicators.

Explanation:

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Answer 2

Explanation:

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→An indicator is a substance which changes color in the presence of acids or alkalis.

→In the laboratory, we use three indicators.

→These are litmus, phenolphthalein and methyl orange.

→Many red or blue colored flowers contain natural dyes which can be used as indicators.

Hope it helps...