Advertisements
Advertisements
प्रश्न
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to existence
Advertisements
उत्तर
Existence
Elements –Elements i.e. atoms are present on their own. e.g. Iron and sulphur exist on their own as elements iron and sulphur.
Compounds – Components in a compound present in a definite proportion. e.g. Iron and sulphur are chemically combined in a fixed ratio in iron sulphide
Mixtures –Components in a mixture present in any proportion. e.g. Iron and sulphur are mixed in any ratio in the mixture of iron and sulphur.
संबंधित प्रश्न
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.
What is the difference between a pure substance and a mixture ?
Define Compounds
Name the elements which form water.
How will you justify that water is a compound?
Name the elements present in Ammonia
State three differences between water and air.
Give the example of a compound containing calcium and oxygen.
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 properties
What is the molecular formula of the following compound?
Hydrochloric acid
What is the molecular formula of the following compound?
Sodium chloride
Explain the term mixture.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which is known to form the largest number of compounds.
Classify the following as element and compound,
- Silver
- Ammonia
- Water
- Mercury.
Write any two properties of a compound.
Higher-Order Thinking questions:
Why is water considered a compound?
The other name for potassium hydroxide is caustic potash.
A compound has a fixed ______.
