universal indicator
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Universal Indicator
A mixture of dyes that changes colour gradually over a range of pH and is used (especially as indicator paper) in testing for acids and alkalis.
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A mixture of dyes that changes colour gradually over a range of pH and is used (especially as indicator paper) in testing for acids and alkalis.
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Answered by
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Explanation:
a substance that changes to different colours according to whether another substance that touches it is an acid or an alkali
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