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प्रश्न
The methods of separating components of a given mixture are based on the
विकल्प
physical properties and state of the components
colour of the components only.
state of the components
none of these
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उत्तर
physical properties and state of the components
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संबंधित प्रश्न
State four important characteristics of compounds
What is the proportion of element present in the following compound?
H2O
State three differences between water and air.
State two characteristics of water which prove that it is a – compound.
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?
Sodium chloride
What is the molecular formula of the following compound?
Methane
Write the chemical formula and name the elements present in the following compounds.
- Sodium chloride
- Potassium hydroxide
- Carbon dioxide
- Calcium oxide
- Sulphur dioxide
Match the following.
| Iron | For making wires |
| Copper | Sewing needle |
| Tungsten | As a fuel for ignition in rocket |
| Boron | Making the filament of a bulb |
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.
