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Question-1
A mixture contains two solids A and B. Solid A is light in weight while solid B is very heavy. Their sizes are almost same. Here, A is the unwanted component. To get pure solid B, which separation method would you suggest ?
(A)
Sieving
(B)
Winnowing
(C)
Magnetic separation
(D)
Filtration
Question-2
To separate ammonium chloride from common salt, we use:
(A)
Filtration
(B)
Sedimentation
(C)
Sieving
(D)
Sublimation
Question-3
Some iron fillings are mixed with sand. We can separate them using magnetic separation method. This method is applicable only when:
(A)
Magnetic substances are mixed up with non magnetic substances
(B)
Magnetic substances are mixed up with magnetic substances
(C)
Magnetic substances are heated beyond their curie temperatures
(D)
Two magnetic substances have equal melting points
Question-4
Identify the mixture from the following.
(A)
Carbon dioxide
(B)
Iron
(C)
Hydrogen
(D)
Air
Question-5
A few coloured glass pieces that are big in size are mixed with sugar. The easiest way to separate them is:
(A)
Heat the mixture
(B)
Add the mixture to water
(C)
Handpick the glass pieces
(D)
Handpick the sugar particles
Question-6
Winnowing is useful only when:
(A)
Two solids have different melting points
(B)
Two solids have different boiling points
(C)
Two solids have different magnetic properties
(D)
Two solids have different weights
Question-7
You can use decantation to separate:
(A)
Two miscible liquids
(B)
Two immiscible liquids
(C)
Two metals in an alloy
(D)
Solid- solid water
Question-8
Which of the following is NOT a homogenous mixture?
(A)
Sugar solution
(B)
Salt solution
(C)
Iron fillings in sand
(D)
All of the above
Question-9
Which method is used to separate a mixture of two or more gases?
(A)
Sedimentation
(B)
Liquefaction
(C)
Distillation
(D)
Decantation
Question-10
Which of the following mixtures will be the most difficult to separate?
(A)
Iron filings + sand
(B)
Sand + water
(C)
Saw dust + stones
(D)
Nitrogen + hydrogen
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Cambridge Secondary Grade 6
IGCSE
Practice in Related Chapters
Sources of Food
Fibre to Fabrics
The Habitat of the Living
Body Movements in Animals
Things Around Us
Changes Around Us
Plants-Form and Function
Different Kind of Materials
Water
Components of Food
Fun with Magnets
Light, Shadow and Reflection
Separating Substances
Electric Current and Circuits
Waste Management
Air
Motion and Measurement of Distances
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