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Distinguish clearly between hard and ...

Distinguish clearly between
hard and soft water

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CENGAGE CHEMISTRY ENGLISH-HYDROGEN, WATER AND HYDROGEN PEROXIDE-Ex 3.2
  1. How is heavy water prepared from ordinary water ? Discuss its importan...

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  2. Explain, why water has high boiling and melting points as compared to ...

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  3. Distinguish clearly between hard and soft water

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

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  5. Is it correct to say that hydrogen can behave as a metal? If it is cor...

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  6. What is importance of the heavier isotopes of hydrogen?

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  7. Does hydrogen show allotropy? How many allotropes of dihydrogen are kn...

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  8. What is understood by 'hydrogen gap'?

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  9. Hydrogen forms three types of bonds in its compounds. Giving suitable ...

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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 the terms ‘hydrolysis’ and ‘hydration’ ...

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  14. What is meant by hydrogenation?

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  15. What are tHe advantages in using hydrogen as a fuel ?

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  16. Why are ionic hydrides frequently used to remove traces of water from ...

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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 from top towards bottom ?

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  19. Why is ice less dense than water and what kind of attractive forces mu...

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

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