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Hydrogen is a combustible gas and oxygen...

Hydrogen is a combustible gas and oxygen is a supporter of combustion. Water contains both hydrogen and oxygen but it is used to existinguish fire. Explain.

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Hydrogen and oxygen are elements and have their characteristic properties. But water is a compound of hydrogen and oxygen combined together in a fixed ratio of 1 : 8 by mass. The properties of a compound are entirely different from those of its constituent atoms from which it is formed. Therefore, water has different properties than hydrogen and oxygen.
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MTG IIT JEE FOUNDATION-MATTER : ELEMENTS COMPOUNDS AND MIXTURES -SOLVED EXAMPLES
  1. Give two examples of solution.

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  2. Why is mixture called impure substance?

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  3. Hydrogen is a combustible gas and oxygen is a supporter of combustion....

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  4. When we heat iron filings and sulphur till red hot, do we get compound...

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  5. Which of the following matter falls in the category of mixtures? Ice, ...

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  6. How would you confirm that a colourless liquid given to you is pu...

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  7. What is 'tincture of iodine'?

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  8. What are alloys?

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  9. Name the components of solution.

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  10. Write the formulae of sodium oxide

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  11. Write the formulae of aluminium chloride

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  12. Write the formulae of sodium sulphide

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  13. Write the formulae of magnesium hydroxide

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  14. Give the name of elements present in the following compounds. Quick ...

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  15. Give the name of elements present in the following compounds. Hydrog...

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  16. Give the name of elements present in the following compounds. Baking...

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  17. Give the name of elements present in the following compounds. Potass...

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  18. An element E is trivalent. Write the formula of its (i) chloride (ii) ...

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  19. What do you understand by variable valency'? Give two examples of meta...

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  20. Give the names of any three elements whose names have been derived fro...

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