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Worksheetschapter 2 class 9
Total questions: 13
Worksheet time: 8mins
which of the following is a colloidal solution?
Water
Mud and water
Lemmonade
Milk
NAME THE SEPARATION TECHNIQUE
FRACTIONAL DISTILLATION
DISTILLATION
SEPARATING FUNNEL
EVAPORATION
Air is regarded as a mixture because:
Its pressure may very
Its pressure may very
Its volume changes under different conditions
Its composition may vary
The process used to separate oil and water is:
Distillation
Sublimation
Separating funnel
chromatography
Two substances A and B when bought together form a substance C with the evolution of heat. The properties of C are entirely different from those of A and B. the substance C is:
A compound
An element
A mixture
None of the above
A sample contains two substances and has uniform properties. The sample is:
A compound
A heterogeneous mixture
An element
A homogeneous mixture
Distillation is a good separation technique for:
Solids
Liquids
Solid alloys
Gases
If we put camphor in an open container, its amount keeps on decreasing due to the phenomenon of
Evaporation
Precipitation
Condensation
Sublimation
brass is an alloy. It is a mixture of______
30% Zinc 70% copper
20% copper 80% nickel
40% iron 80% copper
35% gold 65% zinc
colloids can be seperated by
filtration
distillation
sedimentation
centrifugation
a mixture of dye in a volatile liquid can be seperated by?
evaporatoion
sedimentation
chromatography
filtration
Tyndall effect is observed in forests because of
tress
high oxygen level
mist and dust particles in the air
less sunlight
Which of the following is not a mixture?
Pure water.
Sea water.
Air.
Brass.
