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प्रश्न
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to properties
उत्तर
Properties
Elements – Elements have a definite set of properties. Elements classified into metal and non-metals each with its own properties.
Compounds – Compounds have a definite set of properties. Elements of a compound do not retain their original properties.
Mixtures – Mixture not have a definite set of properties. Components of a mixture do retain their original properties.
संबंधित प्रश्न
Select the correct alternative from the choices given for the following statement:
A set of mixture is
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.
Name the elements present in Sugar
Name the elements present in Marble
What is the proportion of element present in the following compound?
H2O
What is the proportion of element present in the following compound?
CaO
Give the example of a compound containing carbon and oxygen.
Give the example of a compound containing calcium and oxygen.
State two characteristics of water which prove that it is a – compound.
Select the correct answer from the choice given below.
A compound
What is the molecular formula of the following compound?
Hydrochloric acid
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 |
What is meant by compound?
Sodium chloride is used as table salt and for flavoring and preserving food.
Complete the table
| Compound | Constituent elements |
| Sodium carbonate | Sodium, Carbon. Oxygen |
| Water | |
| Calcium oxide | |
| Sugar | Carbon, Hydrogen, Oxygen |
The other name for potassium hydroxide is caustic potash.
