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What do you understand by the hardness o...

What do you understand by the hardness of water and what are the causes of hardness ?

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ICSE-HYDROGEN-SHORT ANSWER TYPE QUESTIONS
  1. Water can hydrolyse halides, carbides, nitrides, etc. Explain with exa...

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  2. Are all the five H(2)O molecules in CuSO(4). 5H(2)O equivalent? If not...

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

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  4. What do you understand by the temporary hardness and permanent hardnes...

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  5. What do you understand by softening of hard water? How is the water ha...

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  6. Describe any two methods that may be used to remove permanent hardness...

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  7. Describe calgon process used for softening of hard water.

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  8. Describe the permutit process used for water softening.

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  9. What is deionised water and how is it prepared ?

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  10. Discuss the principle and method of softening of hard water by synthet...

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  11. What is heavy water and how is it prepared?

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  12. What happens when heavy water is treated with Na

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  13. What happens when heavy water reacts with CaO

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

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  15. What happens when heavy water is treated with Al(4)C(3)

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  16. What happens when heavy water is treated with Ca(3)P(2)

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  17. What is deuterolysis? Give two examples.

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  18. What do you understand by the exchange reactions of heavy water ? Give...

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

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  20. Mention some important uses of heavy water.

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