define universal indicator
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Explanation:
SUBSTANCE WHICH CHANGES TO ANOTHER COLOUR LIKE OTHER SUBSTANCE
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Deifinitions:
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.
A Universal indicator is a pH indicator composed of a solution of several compounds that exhibits several smooth colour changes over a pH value range from 1-14 to indicate the acidity or alkalinity of solutions.
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