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Ann [662]
3 years ago
5

What is an indicator?

Physics
1 answer:
valkas [14]3 years ago
4 0
The answer is A because An Indicator" changes color when it comes in contact with an acid or a base

An indicator could be anything like:
1) Litmus paper
2) Bromothymol blue
3) Phenolphthalein
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4 years ago
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