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WorksheetsChapter 2: Pure substance, mixture & compounds
Total questions: 20
Worksheet time: 10mins
______ is a compound of hydrogen and oxygen.
Acid
Water
Hydrogen gas
Air
An example of homogeneous mixture of molten metals is ______.
bronze
glass
boron
calcium
Milk is a/an ____ substance.
impure
pure
compound
element
Iron sulphide is a/an _____.
mixture
chemical compound
element
pure substance
The constituents of a compound can be separated by _____________.
physical means only
chemical means only
both physical and chemical means
heating and then cooling
When a mixture is formed, _______________.
a physical change takes place
a chemical change takes place
both physical and chemical changes take place
a physical change is replaced by a chemical change
A mixture of sand in water is an example of a _____________.
heterogeneous mixture
homogeneous mixture
homogeneous solution
chemical compound
The constituents of a mixture are present in a ___________ ratio.
fixed
variable
2:1
1:2
A pure substance is defined as a homogeneous material which contains ______ kind of particles.
different
same
more than two
not more than two
Compounds are ______ in nature.
heterogeneous and pure
homogeneous and pure
heterogeneous and impure
homogeneous and impure
The constituents of a compound ______________.
have properties identical to the final compound.
have properties that are partially different from the final compound.
have properties that are completely different from the final compound.
have no properties of their own, unlike the final compound.
A compound has ______________.
a combination of many elements and compounds
only one kind of element
a combination of 2 or more elements
only one kind of molecule
Identify the mixture from the following:
Air
Oxygen
Water
Carbon dioxide
Which is the odd one out?
Bronze
Water
Brass
Butter milk
In mixtures, constituents exhibit
similar properties
new physical properties
their own properties
only chemical properties
What kind of mixtures are alloys?
Solid-liquid
Solid-solid
Gas-liquid
Liquid-liquid
Which of the following substances has the properties listed above?
Iodine
Calcium
Air
Sugar
Find the odd one out:
Air
Iodine
Bromine
Water
Heterogeneous mixture differs from homogeneous because it has a/the _______composition of constituents.
variable
same
definite
uniform
Copper sulphate solution is a ______mixture, whereas oil in water is a _______ mixture.
homogeneous, heterogeneous
both homogeneous
heterogeneous, homogeneous
both heterogeneous
