simple indicator and universal indicator
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UNIVERSAL INDICATOR-is a test to measure the PH value of a liquid.this solution have many chemical indicators in it.
SIMPLE INDICATOR-IT Is also called natural indicators. It is a natural substance that is used to determine the PH of another substances.
EXAMPLES - RED CABBAGE AND GRAPE JUICE.
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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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