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How does the atomic hydrogen or oxy-hydr...

How does the atomic hydrogen or oxy-hydrogen torch funtion for cutting and welding purposes? Explain.

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Atomic hydrogen atoms are produced by the dissociation of dihydrogen with the help of an electric arc. This releases a huge amount of energy `(435.88 kJ mol^(–1))`. This energy can be used to generate a temperature of 4000 K, which is ideal for welding and cutting metals. Hence, atomic hydrogen or oxy-hydrogen torches are used for these purposes. For this reason, atomic hydrogen is allowed to recombine on the surface to be welded to generate the desired
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NCERT-HYDROGEN-EXERCISE
  1. What do you understand by the term “non-stoichiometric hydrides”? Do y...

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  2. How do you expect the metallic hydrides to be useful for hydrogen stor...

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  3. How does the atomic hydrogen or oxy-hydrogen torch funtion for cutting...

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  4. Among NH(3),H(2)O, and HF, which would you expect to have highest magn...

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  5. Saline hydrides are known to react with water violently producing fire...

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  6. Arrange the following (i) CaH(2), BeH(2) and TiH(2) in order of increa...

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  7. Compare the stuctures of H(2)O and H(2)O(2).

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  8. What do you understand by the term 'auto-protolysis' of water? What is...

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  9. Consider the reacton of water with F(2) and suggest, in terms of oxida...

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  10. Complete the following chemical reactions. (i) PbS(s)+H(2)O(2)(aq) t...

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

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  12. What causes the temporary and permanent hardness of water ?

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

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  14. Write chemical reactions to show the amphoteric nature of water.

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  15. Write chemical reactions to justifty that hydrogen peroxide can functi...

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  16. What is meant by 'demineralised water' and how it can be obtained?

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  17. Is demineralised or distilled water useful for drinking purpose? If no...

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  18. Describe the usefulness of water in bioshphere and biological systems.

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  19. What properties of water make it useful as a solvent? What types of co...

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  20. Knowing the properties of H(2)O and D(2)O, do you think that D(2)O can...

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