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प्रश्न
Name the elements present in Washing soda
उत्तर
Elements present in Washing soda:
Sodium, carbon & oxygen
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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
Fill in the blank
In a _______ the substances are not combined chemically.
Write true or false
The constituents of a mixture can only be separated by chemical means.
What is the difference between a pure substance and a mixture ?
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
Write the molecular formulae of compound calcium oxide.
Write the molecular formulae of compound carbon monoxide
Write the molecular formulae of compound lead sulphide.
Give the example of a compound containing hydrogen and oxygen.
State two characteristics of water which prove that it is a – compound.
What is the molecular formula of the following compound?
Hydrochloric acid
Explain the difference between Mixture and compounds.
What are compounds? Give two examples.
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 |
A compound has a fixed ______.
