Advertisements
Advertisements
प्रश्न
What is the proportion of element present in the following compound?
CaO
Advertisements
उत्तर
| Compound | Element | Proportion of Element |
| CaO | Ca : O | 5 : 2 |
APPEARS IN
संबंधित प्रश्न
Write true or false
The constituents of a mixture can only be separated by chemical means.
Write true or false
Handpicking can be used as a separation technique if the particle size of the constituents of the mixture is the same.
Define Compounds
Name two compounds which dissolve in water.
Write the molecular formulae of compound calcium oxide.
Give the example of a compound containing carbon and oxygen.
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
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to Separation of compound
Explain the difference between Mixture and compounds.
Explain the term mixture.
State true of false. If false, give the correct statement.
Compounds and elements are pure substances.
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 |
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.
Classify the following as element and compound,
- Silver
- Ammonia
- Water
- Mercury.
Write any two properties of a compound.
Reason out
Sand is also known as silica.
When does the pressure of the gas increase?
A compound has a definite ______.
Name the compounds used in fertilizers.
