Check whether each of these papers shows different colours in dilute acid and alkali. Record the experiments and observations in your science diary. Colour in alkali Substance Colour in acid Indicators What are the substances that can be used to distinguish between acids and alkalis?
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ph paper can be used to distinguish if colour level is below 7 it is alkali 7 is neutral and above 7 is acid .please see the colour to know in your book.
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