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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
Write true or false
The constituents of a mixture can only be separated by chemical means.
Define Compounds
Name the elements present in Marble
Name the elements present in Washing soda
What is the proportion of element present in the following compound?
H2O
What is the proportion of element present in the following compound?
CO2
What is the proportion of element present in the following compound?
CaO
State three differences between water and air.
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to the term
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to properties
What is the molecular formula of the following compound?
glucose
What is the molecular formula of the following compound?
Methane
Explain the difference between Mixture and compounds.
Explain the term mixture.
Mention any four compounds and their uses.
State whether true or false. If false, correct the statement.
Aspirin is composed of 60% Carbon, 4.5% Hydrogen and 35.5% Oxygen by mass. Aspirin is a mixture.
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.
Classify the following as element and compound,
- Silver
- Ammonia
- Water
- Mercury.
Reason out
Sand is also known as silica.
