Given ,three unlabelled colourless liquids in three separate bottles marked A,B,C containing salt solution,
dilute acid and an alkali. How you would check and label them.
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First we will take blue litmus paper and dip it it separately in each of the bottles. If there's no change in colour the solution may be basic or neither acidic nor basic. If the litmus changes from blue to red that means the bottle contains acid. So we will lable this as acid.
Now we are left with two bottles. This time we will take red litmus paper and dip in the two bottles separately. If the colour of litmus paper changes from red to blue that means it is basic. In the bottle there's no change is neither acidic nor basic.
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