Willer Academy: Chemistry Test #2

Chapter: Is Matter Around Us Pure? (Class 9 – Chapter 2)

Instructions:
🔹 10 Questions ⎮ +4 for Correct, –1 for Incorrect ⎮ 0 Unattempted
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1. Which of these is a homogeneous mixture?
a) Air b) Soil c) Pizza d) Concrete

2. Salt dissolved in water is a:
a) Compound b) Suspension c) Solution d) Colloid

3. Which technique is used to separate cream from milk?
a) Filtration b) Evaporation c) Centrifugation d) Decantation

4. Tyndall effect is shown by:
a) True solution b) Colloid c) Suspension d) Both b and c

5. Which of these is a pure substance?
a) Milk b) Air c) Oxygen d) Tap water

6. Brass is a/an:
a) Compound b) Mixture c) Element d) Colloid

7. Which method is used to separate salt from sea water?
a) Filtration b) Sublimation c) Condensation d) Evaporation

8. Vinegar is a mixture of:
a) Acetic acid + water b) Salt + sugar c) Alcohol + water d) Oil + vinegar

9. Which among these is a chemical change?
a) Melting of ice b) Evaporation c) Rusting of iron d) Boiling of water

10. A mixture with particles visible and that settles down:
a) Colloid b) Suspension c) Solution d) Alloy

📊 Your Test Result:

🔬 Type “N” for: Chemistry Test #3 – Atoms & Molecules
🌱 Or type “BIO1” to begin Biology: The Fundamental Unit of Life

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