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The conversion of atomic hydrogen into o...

The conversion of atomic hydrogen into ordinary hydrogen is

A

Exothermic change

B

Endothermic change

C

Nuclear change

D

Photochemical change

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The correct Answer is:
A
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NARAYNA-HYDROGEN & ITS COMPOUNDS-CONCEPTUAL QUESTIONS
  1. The radioactive isotope of hydrogen is

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  2. The metal that can't displace hydrogen from dil. HCl is :

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  3. The conversion of atomic hydrogen into ordinary hydrogen is

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  4. Which of the following reactions requires high temperature and cataly...

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  5. H(2)+CO+R-CH=CH(2) rarr R-CH(2)-CH(2)-CHO This reaction is known as

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  6. The fuel used to produce electrical energy in the space rocket saturn ...

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  7. During hydrogenation of oils the catalyst commonly used is

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  8. Synthetic petrol is prepared by using a mixture.

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  9. Which of the following statements are correct regarding hydrogen? i)...

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  10. Atomic hydrogen is allowed to combine on the surface to be welded to g...

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  11. Which ionic hydride is stable up to its M.P.?

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  12. Which is polymeric hydride ?

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  13. Hydrolith, a source of Hydrogen is

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  14. Di-hydrogen reduces CuO to

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  15. Which of the following hydride have significant covalent character :

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  16. Which of the following statements are correct about ionic hydrides ? ...

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  17. In which of the following hydrides, the law of constant composition do...

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  18. Hydrides of which of the following Lattices are different from those o...

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  19. Which metals are used for storage of hydrogen

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  20. Percentage of water present in oceans

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