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Distinguish between : a. Hard water an...

Distinguish between :
a. Hard water and soft water
b. Temporary hardness and permanent hardness

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CENGAGE CHEMISTRY-HYDROGEN, WATER AND HYDROGEN PEROXIDE-Ex 3.2
  1. How is heavy water prepared form normal water?

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  2. Explain why water has high boling and melting points are compared to H...

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  3. Distinguish between : a. Hard water and soft water b. Temporary ha...

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  4. Explain the correct context in which the following terms are used: a...

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  5. Is it correct to say that hydrogen can behaves as a metal? State the c...

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  6. Name the isotopes of hydrogen. What is importance of the heavier isoto...

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  7. How many allotropes of dihydrogen are known? What is their importance?

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  8. Name the class of hydrides to which H(2)O(2),B(2)H(6),NaH and LaH(3) b...

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  9. Hydrogen forms three types of bond in its compounds. Describe each typ...

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  10. Elements with atomic numbers 17 and 20 form compounds with hydrogen. W...

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  11. Complete the following reactions. a.CaO((s))+H(2(g))to,b.CO(g)+H(2(g...

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  12. Describe some unusual properties of water.

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  13. What is the difference between hydrolysis and hydrations?

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  14. What is understood by hydrogenations?

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  15. What are the advantanges in using hydrogen as a fuel?

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  16. Ionic hydrides are frequently used to remove traces of water from orga...

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  17. Although D(2)O resembles H(2)O chemically yet it is a toxic substance....

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  18. Why do lakes freeze form water top towards bottom?

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  19. Why is ice dense than water and what kind of attractive force must be ...

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  20. A white solid is either Na(2)O or Na(2)O. A piece of red litmus paper ...

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