Which is universal indicator.?
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A universal indicator is a solution which undergoes several color changes over a wide range of pH's. The color is used to "indicate" pH directly. Universal indicators are usually mixtures of several indicators.
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A universal indicator is a solution which undergoes several color changes over a wide range of pH's. The color is used to "indicate" pH directly. Universal indicators are usually mixtures of several indicators.
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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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