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What do you understand by hardness of wa...

What do you understand by hardness of water? Describe the permutit and calgon processes used to remove the permanent hardness of water.

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ICSE-HYDROGEN-ESSAY (LONG ANSWER) TYPE QUESTIONS
  1. With the help of balanced chemical equations, describe how does water ...

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  2. What are hydrides and how are they classified?

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  3. What do you understand by hardness of water? Describe the permutit and...

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  4. What is deionised water? Describe the process used to obtain it.

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  5. Describe the important processes used for the preparation of hydrogen ...

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  6. Hydrogen peroxide can act both as an oxidising and a reducing agent. J...

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  7. Why should hydrogen be assigned a separate position in the periodic ta...

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  8. Hydrogen forms compounds with elements having atomic numbers 9, 11, 12...

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  9. What are interstitial hydrides and how do they differ from molecular h...

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  10. Describe the industrial applications of hydrogen which depend on the h...

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  11. Describe the industrial applications of hydrogen which depend on its...

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  12. Describe the industrial applications of hydrogen which depend on its...

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  13. How is dihydrogen prepared in the laboratory in pure form,

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  14. How would you prepare dihydrogen from water by using a reducing agen...

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  15. How is dihydrogen prepared from hydrocarbons ?

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  16. How is heavy water prepared from ordinary water ? Discuss its importan...

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  17. Describe the structure of the common form of ice.

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  18. Discuss the principle and method of softening of hard water by organic...

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  19. Write chemical reactions to justify that hydrogen peroxide can functio...

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  20. Compare the chemical properties of H(2)O and H(2)O(2).

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