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When hydrogen burns is oxygen, water is ...

When hydrogen burns is oxygen, water is formed and when water is electrolysed, then hydrogen and oxygen are produced. What type of reaction takes place :
(a) in the first case.
(b) in the second case ?

Text Solution

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The correct Answer is:
(a) Combination reaction (b) Decomposition reaction
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LAKHMIR SINGH & MANJIT KAUR-CHEMICAL REACTIONS AND EQUATIONS -Exercise
  1. When a green iron salt is heated strongly , its colour finally changes...

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  2. A colourless lead salt, when heated , produces a yellow residue and br...

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  3. When hydrogen burns is oxygen, water is formed and when water is ele...

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  4. A strip of metal X is dipped in the blue coloured salt solution YSO(4...

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  5. When a black metal compound XO is heated with a colourless gas Y(2) , ...

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  6. A metal X forms a water-soluble seat XNO(3) When an aqueous solution o...

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  7. Two metals X and Y form the salts XSO(4) and Y(2)SO(4) respectively.Th...

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  8. A red-brown metal X forms a salt XSO(4) . When hydrogen sulphide gas i...

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  9. When a strip of red-brown metal X is placed in a colourless salt solut...

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  10. A metal salt MX when exposed to light splits up to form metal M and a ...

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  11. Why should a magnesium ribbon be cleaned before burning in air?

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  12. Write the balanced equation for the following chemical reactions. (i...

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  13. Write a balanced chemical equation with state symbols for the followin...

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  14. A solution of a substance ‘X’ is used for whitewashing. (i) Name t...

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  15. Why is the amount of gas collected in one of the test tubes in Activit...

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  16. Why does the colour of copper sulphate solution change when an iron na...

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  17. Give an example of a double displacement reaction.

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  18. Identify the substances that are oxidised and the substances that are ...

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  19. Which of the statements about the reaction below are incorrect? 2PbO...

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  20. Fe(2)O(3) + 2Al rarr Al(2)O(3) + 2Fe The above reaction is an exampl...

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