Advertisements
Advertisements
Question
State two characteristics of water which prove that it is a – compound.
Solution
Characteristics of compounds
- Elements in a compound are present in a definite proportion. Example 2 atoms of hydrogen combine with 1 atom of oxygen to give 1 molecule of water (compound) H2 + O = H2O (water)
- Compounds have a definite set of properties
Example: The properties of the compound water are different from the properties of the elements of hydrogen and oxygen in the water.
RELATED QUESTIONS
What are the different types of mixtures ?
State four important characteristics of compounds
Name the elements present in Washing soda
State three differences between water and air.
State four differences between compounds and mixtures.
Write the molecular formulae of compound calcium oxide.
Write the molecular formulae of compound carbon monoxide
Give the example of a compound containing nitrogen and oxygen.
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to the term
What is the molecular formula of the following compound?
Sodium chloride
What is the molecular formula of the following compound?
glucose
State true of false. If false, give the correct statement.
Compounds and elements are pure substances.
Explain the characteristics of compounds
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.
What is meant by compound?
Reason out
Sand is also known as silica.
When does the pressure of the gas increase?
Name the compounds used in fertilizers.
