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Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and third is a sugar solution. How will you identify them? You have only turmeric indicator.
We will drop each hydrochloric acid, sodium hydroxide, and sugar solution on the turmeric indicator. The liquid which changes the colour of the turmeric indicator to is basic, that is, sodium hydroxide.
Now, we will place a drop of sodium hydroxide on a drop of each of the other two liquids separately. After that, we will put the drops of these mixtures on the indicator. The drop, which will change the colour of the turmeric indicator to , has a sugar solution. This is due to the mixture of basic and neutral solutions, which is .
On the other hand, the drop, which will not change the colour of the turmeric indicator, contains hydrochloric acid. This is due to the hydrochloric acid reacting with sodium hydroxide to form a solution.
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