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Explain the formation of scum when hard ...

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

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Soap does not work properly when the water is hard A soap is sodium or potassium salt of long chain fatty acids .Hard water contains salts of calcium and magnesium .When soap is added to hard water calcium and magnesium ions present in water displace sodium or potassoum ions form the soap molecules forming an insoluble substance called scum .A lot of soap is wasted the process.
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OSWAL PUBLICATION-CARBON COMPOUNDS -NCERT CORNER (Exercise Questions)
  1. Ethane, with the molecular formula C(2)H(6) has

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  2. Butanone is a four-carbon compound with the functional group

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  3. While cooking, if the bottom of the vessel is getting blackened on the...

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  4. Explain the nature of the covalent bond using the bond formation in CH...

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  5. Draw the electron dot structures for Ethanoic acid

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  6. Draw the electron dot structures for H(2)S

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  7. Draw the electron dot structures for : propanone.

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  8. Draw the electron dot structures for F(2)

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  9. What is a homologous series ? Explain with an example.

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  10. How can ethanol and ethanoic acid be differentiated on the basis of th...

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  11. Why does micelle formation take place when soap is added to water? Wil...

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  12. Why are carbon and its compounds used as fuels for most applications?

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

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  14. What change will you observe if you test soap with litmus paper (red a...

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  15. What is hydrogenation? What is its industrial application?

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  16. Which of the following hydrocarbons undergo addition reactions: C(2)H...

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  17. Give a test that can be used to differentiate chemically between butte...

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  18. Explain the mechanism of the cleaning action of soaps.

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