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Quiz on Is Matter Around Us Pure?

Class IX
Science
Is Matter Around Us Pure?
12 questions
MEDIUM

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1. What is a pure substance?

A substance with a uniform composition · A mixture of different substances · A substance that can be easily separated · A substance that changes state easily

2. Which of the following is an example of a homogeneous mixture?

Sand and salt · Air · Oil and water · Fruit salad

3. What is the main characteristic of a heterogeneous mixture?

Uniform composition throughout · Easily distinguishable components · Single phase only · No visible boundaries

4. Which of the following is a method to separate a mixture?

Evaporation · Condensation · Sublimation · All of the above

5. Which of the following is NOT a characteristic of a pure substance?

Fixed melting point · Fixed boiling point · Variable composition · Homogeneous