Advertisements
Advertisements
Question
State three reasons why you think air is a mixture and water is a compound.
Advertisements
Solution
Air is a mixture because:
- It contains two or more pure substances.
- It can be separated into simpler substances by physical processes.
- Its composition is not fixed.
Water is a compound because:
- Water cannot be separated into its constituents i.e., hydrogen and oxygen by physical methods.
- Properties of water are entirely different from those of its constituents.
- The composition of water is fixed.
- Its constituents are present in fixed proportion by mass. Water has a definite formula (H2O).
APPEARS IN
RELATED QUESTIONS
Fill in the blank
Mixtures can be ________ or _______
Differentiate between homogeneous and heterogeneous mixtures with examples.
What is meant by (i) homogeneous mixtures, and (ii) heterogeneous mixtures ? Give two examples of homogeneous mixtures and two of heterogenous mixtures.
Name the process you would use to separate ammonium chloride from a mixture of sodium chloride and ammonium chloride.
Solutions are
Write “true” or “false” for the following statement
Air can be separated from water by filtration.
Give an example of mixtures of elements and compounds.
How will you separate a mixture containing saw dust, naphthalene and iron filings?
Suggest separation technique(s) one would need to employ to separate the following mixture.
Mercury and water
LPG is ______ gas.
