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Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.

NCERT Solutions for Class 7th Science Chapter 5 Acids, Bases and Salts Page 57 Exercise Question 10


We know that basic and neutral solutions do not change the colour of blue litmus paper. Since blue litmus remains blue after dipping in the solution, the solution is either basic or neutral in nature. Put a drop of this solution on a red litmus paper. If it turns blue, then the above solution is basic in nature and if no colour is formed then the above solution is acid. .
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