Colloids and Their Properties
Chemistry ⇒ Solutions and Colloids
Colloids and Their Properties starts at 10 and continues till grade 12.
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See sample questions for grade 10
Define the Tyndall effect.
Describe the role of protective colloids.
Explain the difference between a sol and a gel.
Explain the term 'Brownian movement' in colloids.
Explain why colloidal particles do not settle down under gravity.
Explain why colloidal solutions are stable.
Name the two phases present in a colloidal system.
State one difference between lyophilic and lyophobic colloids.
What is the typical size range of colloidal particles? (1) 1 nm – 10 nm (2) 1 nm – 1000 nm (3) 1 μm – 10 μm (4) 10 μm – 100 μm
Which method is commonly used to purify colloids? (1) Filtration (2) Dialysis (3) Distillation (4) Decantation
Which of the following is a characteristic property of colloids? (1) Homogeneous (2) Show Tyndall effect (3) Particles settle on standing (4) Cannot be filtered by ultrafilters
Which of the following is a colloidal solution? (1) Sugar solution (2) Milk (3) Salt solution (4) Copper sulphate solution
Colloidal particles can be separated from the dispersion medium by ______.
The continuous phase in a colloidal system is also called the ______.
The particles in a colloid are ______ than those in a solution but ______ than those in a suspension.
The process of precipitation of colloidal particles by adding an electrolyte is called ______.
Colloidal particles are visible to the naked eye. True or False?
Colloidal particles can pass through ordinary filter paper. Yes or No?
Colloidal solutions are always transparent. True or False?
Colloidal solutions can be filtered using ordinary filter paper. Yes or No?
