Question

What change will you observe if you test soap with litmus paper (red and blue)?

Answer 1

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• When soap is dissolved in water, due to the formation of alkaline NaOH or KOH, the solution is alkaline. The solution changes the colour of the red litmus to blue, but in the soap solution, the blue litmus remains blue.

Answer 2

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When we put a drop of soap solution on a red litmus paper, color change will be observed and red litmus paper will turn into blue. - It gives us the conclusion that soap solutions are alkaline in nature.

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