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प्रश्न
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to existence
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उत्तर
Existence
Elements –Elements i.e. atoms are present on their own. e.g. Iron and sulphur exist on their own as elements iron and sulphur.
Compounds – Components in a compound present in a definite proportion. e.g. Iron and sulphur are chemically combined in a fixed ratio in iron sulphide
Mixtures –Components in a mixture present in any proportion. e.g. Iron and sulphur are mixed in any ratio in the mixture of iron and sulphur.
संबंधित प्रश्न
Fill in the blank
In a _______ the substances are not combined chemically.
What is the difference between a pure substance and a mixture ?
What are the different types of mixtures ?
Define Compounds
Name the elements present in Ammonia
Name the elements present in Washing soda
What is the proportion of element present in the following compound?
NO2
Name two compounds which dissolve in water.
State four differences between compounds and mixtures.
Write the molecular formulae of compound calcium oxide.
Write the molecular formulae of compound hydrogen sulphide.
Give the example of a compound containing carbon and oxygen.
State two characteristics of water which prove that it is a – compound.
State true of false. If false, give the correct statement.
Compounds and elements are pure substances.
Assertion: Air is a compound.
Reason: Air consists of carbon dioxide.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which is known to form the largest number of compounds.
Write any two properties of a compound.
Name the compounds used in fertilizers.
