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 · Is always a solid · Is a mixture of elements
2. Which of the following is not a characteristic of a mixture?
Variable composition · Homogeneous nature · Separable by physical methods · Consistent properties
3. Which method is used to separate a mixture of solids based on size?
Filtration · Sifting · Crystallization · Distillation
4. What type of mixture has a uniform composition throughout?
Heterogeneous mixture · Homogeneous mixture · Colloid · Suspension
5. What is the main difference between a solution and a colloid?
Size of particles · Color of the mixture · Temperature of the mixture · Presence of a solvent
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