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प्रश्न
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to the term
उत्तर
Term
Elements – Pure substance made up of one kind of atoms only. e.g. Iron [Fe], Sulphur [S]
Compounds – pure substance made up of two or more different elements, e.g. Iron sulphide [FeS]
Mixtures – Impure substance made up of two or more elements or compounds, e.g. Iron and sulphur mixture.
संबंधित प्रश्न
Write true or false
The constituents of a mixture can only be separated by chemical means.
Name the elements which form water.
How will you justify that water is a compound?
State four important characteristics of compounds
Name the elements present in Sugar
What is the proportion of element present in the following compound?
CO2
Name two compounds which dissolve in water.
Write the molecular formulae of compound lead sulphide.
Explain the term compounds.
State two characteristics of water which prove that it is a – compound.
Select the correct answer from the choice given below.
A compound
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to existence
What is the molecular formula of the following compound?
Hydrochloric acid
What is the molecular formula of the following compound?
Methane
Explain the difference between Mixture and compounds.
State true of false. If false, give the correct statement.
Compounds and elements are pure substances.
State whether true or false. If false, correct the statement.
A compound cannot be broken into simpler substances chemically.
What is meant by compound?
Which of the following are not compounds?
- Chlorine gas
- Potassium chloride
- Iron
- Iron sulphide
- Aluminium
- Iodine
- Carbon
- Carbon monoxide
- Sulphur powder
Complete the table
| Compound | Constituent elements |
| Sodium carbonate | Sodium, Carbon. Oxygen |
| Water | |
| Calcium oxide | |
| Sugar | Carbon, Hydrogen, Oxygen |
