Class IX Science Quiz: Is Matter Around Us Pure?
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Preview questions
1. What is a pure substance?
Contains only one type of particle · Can be separated by physical means · Has variable composition · Is always a solid
2. Which of the following is an example of a homogeneous mixture?
Sand and salt · Oil and water · Sugar solution · Fruit salad
3. What technique is used to separate a solid from a liquid?
Filtration · Evaporation · Distillation · Chromatography
4. Which method can be used to separate a mixture of liquids with different boiling points?
Filtration · Evaporation · Distillation · Decantation
5. Which of the following is NOT a characteristic of a colloid?
Heterogeneous mixture · Displays Tyndall effect · Particles settle upon standing · Cannot be separated by filtration
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