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