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Write the chemical formulae of calgon an...

Write the chemical formulae of calgon and permutit. For what purpose are they generally used ?

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ICSE-HYDROGEN-REVIEW EXERCISES
  1. What do you understand by softening of hard water?

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  2. What do you understand by the hardness of water and what are the cause...

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  3. Write the chemical formulae of calgon and permutit. For what purpose a...

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  4. What is heavy water? Can it be used for drinking purposes?

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  5. How is heavy water prepared? Compare its physical properties with ...

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  6. What happens when heavy water reacts with Na

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  7. What happens when heavy water reacts with Al(4)C(3)

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  8. What happens when heavy water reacts with CaO

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  9. What happens when heavy water reacts with P(4)O(10)?

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  10. Give a brief account of the biological and physiological effects of he...

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  11. Mention some important uses of heavy water.

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  12. Describe the auto-oxidation process for the manufacture of H(2)O(2).

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  13. What happens when barium peroxide is treated with cold phosphoric ac...

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  14. What happens when a 50% cold solution of sulphuric acid is subjecte...

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  15. What happens when hydrogen peroxide is treated with potassium ferroc...

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  16. What happens when ferrous sulphate is treated with hydrogen peroxid...

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  17. How is a dilute solution of hydrogen peroxide concentrated?

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  18. Explain, why hydrogen peroxide is used for restoring the colour of old...

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  19. What do you understand by the volume strength of hydrogen peroxide sol...

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  20. Calculate the strength of a 40 volume hydrogen peroxide solution in gL...

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