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Class 9
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Prepare a Colloidal Solution of Sulphur
Prepare a Colloidal Solution of Sulphur
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1)
A substance in which all atoms are alike is called an
None of these
Compound
Mixture
Element
2)
What is the range of the size of colloidal particles?
10 to 100 pm
1 to 100 µm
1 to 10 mm
1 to 100 nm
3)
What happens when light passes through a colloidal solution?
Refracted
Reflected
Scattering
Absorbed
4)
Categorise colloidal solution from the options given below
Heterogeneous mixture
Suspensions
Homogeneous mixture
True solution
5)
Colloidal solution of a gas in liquid called?
Solution
Aerosol
Foam
Gel
6)
Vinegar is a ----- solution and milk is a ------- solution
True, Colloidal
Colloidal, True
Suspension, True
True, Suspension
7)
Emulsion is a colloidal solution of liquid in
Gas
Solid
Air
Liquid
8)
Select the properties of colloidal solution from the options given below
Evolve heat
Absorb heat
None of these
Scatter light
9)
Dust is a colloid
False
True
10)
Which of the following is a characteristic of a colloid?
It forms a homogeneous layer
It forms 2 layers with a solution
It forms turbid layers
It forms heterogeneous layer