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प्रश्न
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to Separation of compound
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उत्तर
Separation of compound
Elements –Elements occur on their own or as compounds and can be separated by chemical and physical methods. Example: Iron, copper.
Compounds – Elements in a compound are chemically combined and can be separated by chemical methods only. Example: Iron Sulphide, copper oxide.
Mixtures – Components in a mixture can be separated by physical methods only.
Example: Iron + sulphur
संबंधित प्रश्न
Fill in the blank
In a _______ the substances are not combined chemically.
Write true or false
The constituents of a mixture can only be separated by chemical means.
What are the different types of mixtures ?
The methods of separating components of a given mixture are based on the
Define Compounds
What is the proportion of element present in the following compound?
H2O
What is the proportion of element present in the following compound?
CaO
Write the molecular formulae of compound lead sulphide.
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to the term
What is the molecular formula of the following compound?
Sulphuric acid
What is the molecular formula of the following compound?
glucose
Explain the term mixture.
Assertion: Air is a compound.
Reason: Air consists of carbon dioxide.
Mention any four compounds and their uses.
Mention the uses of the following compounds.
- Baking soda
- Bleaching powder
- Quick lime
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.
The other name for potassium hydroxide is caustic potash.
