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What change will you observe if you test...

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

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Since soap is basic in nature, it will turn red litmus blue. However, the colour of blue litmus will remain blue.
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NCERT-CARBON AND ITS COMPOUNDS -Exercise
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  14. Why are carbon and its compounds used as fuels for most applications?

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  15. Explain the formation of scum when hard water is treated with soap.

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