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Explain why some times foaming is seen...

Explain why some times foaming is seen in river water near the place the place where sewage water is poured after tratement ?

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Detergents (which are not biodegradable) persist in water even after sewage treatment and thus cause foaming in river water
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PRADEEP-CHEMISTRY IN EVERYDAY LIFE -NCERT EXEMPLAR PROBLEMS (SHORT ANSWER )
  1. What is a soft soap ?

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  2. If soap has high alkali content it irritates skin. How can the amou...

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  3. Explain why some times foaming is seen in river water near the pl...

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  4. Which category of the synthetic detergents is used in toothpaste ...

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  5. Hair shampoos belong to which class of synthetic detergent ?

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  6. Dishwashing soaps are synthetic detergents. What is their chemical nat...

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  7. Draw the diagram showing micelle formation by the following detergent....

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  8. How does the branching of hydrocarbon chain of synthetic detergents a...

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  9. Why is it safer to use soap from the enviromental point of view ?

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  10. What are analgesics ?

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  11. What is the scientific explanation for the feeling of depression ?

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  12. What is the basic difference between antiseptics and disinfectant...

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  13. Between sodiumhydrogen carbonate and magnesium hydroxide , which i...

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  14. Which anaglesis are called opiates ?

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  15. What is the medicinal use of narcotic drugs ?

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  16. What are antagonistic drugs ?

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  17. What is the mode of action of antimicrobial drugs?

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  18. What is the side product of soap industry ? Give reactions showing so...

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  19. What is the differene between bathing soap and washing soaps ?

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  20. How are transparent soaps manufactured ?

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