Advertisements
Advertisements
Question
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to Separation of compound
Advertisements
Solution
Separation of compound
Elements –Elements occur on their own or as compounds and can be separated by chemical and physical methods. Example: Iron, copper.
Compounds – Elements in a compound are chemically combined and can be separated by chemical methods only. Example: Iron Sulphide, copper oxide.
Mixtures – Components in a mixture can be separated by physical methods only.
Example: Iron + sulphur
RELATED QUESTIONS
Write true or false
A heterogeneous mixture has a uniform composition throughout the mixture.
Write true or false
The constituents of a mixture can only be separated by chemical means.
What are the different types of mixtures ?
State four important characteristics of compounds
Name the elements present in Sugar
Name the elements present in Ammonia
Name the elements present in Washing soda
What is the proportion of element present in the following compound?
H2O
Name two compounds which dissolve in water.
State four differences between compounds and mixtures.
Write the molecular formulae of compound hydrogen sulphide.
Explain the term compounds.
Give the example of a compound containing carbon and oxygen.
What is the molecular formula of the following compound?
Sulphuric acid
What is the molecular formula of the following compound?
glucose
Assertion: Oxygen is a compound.
Reason: Oxygen cannot be broken down into anything simpler.
Mention the uses of the following compounds.
- Baking soda
- Bleaching powder
- Quick lime
State whether true or false. If false, correct the statement.
Aspirin is composed of 60% Carbon, 4.5% Hydrogen and 35.5% Oxygen by mass. Aspirin is a 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.
