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Explain why ice floats on water....

Explain why ice floats on water.

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CHHAYA PUBLICATION-HYDROGEN-SHORT-TYPE QUESTIONS
  1. What are the different types of bonds formed by hydrogen in its compou...

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  2. Describe any one industrial preparation of dihydrogen.

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  3. Explain why ice floats on water.

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  4. A fishy smell is obtained when F(2) is passed through water- why?

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  5. Give example of a reaction in which H(2)O acts oxidising agent.

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  6. How can the hardness of water be expressed?

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  7. Hard water cannot be used in boilers -why?

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  8. It is necessary to use calculated amount of lime for the removal of te...

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  9. Explain why water is called'universal solvent'.

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  10. What is heavy water? Why is it so called? How can it be prepared?

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  11. Which one will readily undergo electrolysis? H(2)O, D(2)O .

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  12. Explain the structure of the common form of ice.

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  13. Describe some unusual properties of water.

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  14. H(2)O(2) has both oxidising and reducing properties-why?

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  15. The boiling point of H(2)O(2) is higher than that of H(2)O - why?

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  16. Water and hydrogen peroxide are kept in two separate bottles. How will...

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  17. How does H(2)O(2) display its bleaching property?

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  18. In the preparation of H(2)O(2), "MnO"(2) or "PbO"(2) cannot be used i...

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  19. Why is H(2)O(2) used to restore the original colour of oilpaintings?

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  20. Explain why a solution of H(2)O(2) cannot be stored in an ordinary gl...

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