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How does a soap solution behave with red litmus paper ?

Blue litmus paper turns on contact with an acidic solution.

In the preparation of ultra filter paper collodion solution is used collodion is

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

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