Define Universal Indicator
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A universal indicator is a pH indicator made of a solution of several compounds that exhibits several smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. Experiments with Yamada's universal indicator are also described in the Journal of Chemical Education.
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a substance that changes to different colours according to whether another substance that touches it is an acid or an alkali
अम्ल या क्षार के संयोग से तदनुकूल रंग बदलने वाला पदार्थ; युनिवर्सल इंडिकेटर
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