✓ Dorji has a few bottles of soft drink in his restaurant. But, unfortunately, these are not labelled. He has to serve the drinks on the demand of customers. One customer wants acidic drink, another wants basic and third one wants neutral drink. How will Dorji decide which drink is to be served to whom?
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in order to find out which drink is acidic or basic he has to perform a litmus paper test
acid - blue litmus paper turns red
base - red litmus paper turns blue
neutral - blue litmus stays blue and red litmus stays red
hope it helps : )
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