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प्रश्न
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to the term
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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
Name the process by which the components of following mixtures can be separated.
- Iron and sulphur
- Ammonium chloride and sand
- Common salt from sea water
- Chaff and grain
- Water and mustard oil
- Sugar and water
Define Compounds
State four important characteristics of compounds
Name the elements present in Sugar
What is the proportion of element present in the following compound?
CO2
What is the proportion of element present in the following compound?
CaO
Name two compounds which dissolve in water.
State four differences between compounds and mixtures.
Write the molecular formulae of compound calcium oxide.
Write the molecular formulae of compound lead sulphide.
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 Separation of compound
What is the molecular formula of the following compound?
Sodium chloride
What is the molecular formula of the following compound?
glucose
Explain the term mixture.
Write the chemical formula and name the elements present in the following compounds.
- Sodium chloride
- Potassium hydroxide
- Carbon dioxide
- Calcium oxide
- Sulphur dioxide
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 |
Name the compounds used in fertilizers.
