CBSE Class 9 Science Is Matter Around Us Pure Quiz 1

1. Rusting of an article made up of iron is called

A corrosion and it is a physical as well as chemical change B dissolution and it is a physical change C corrosion and it is a chemical change D dissolution and it is a chemical change

2. A mixture of sulphur and carbon disulphide is

A heterogeneous and shows Tyndall effect B homogeneous and shows Tyndall effect C heterogeneous and does not show Tyndall effect D homogeneous and does not show Tyndall effect

3. Tincture of iodine has antiseptic properties. This solution is made by dissolving

A iodine in potassium iodide B iodine in vaseline C iodine in water D iodine in alcohol

4. Blood and sea water are

A both mixtures B both are compounds C blood is a mixture whereas sea water is a compound D blood is a compound and sea water is a mixture

5. Sol and gel are examples of

A Solid-solid colloids B Sol is a solid-liquid colloid and gel is liquid solid colloid C Sol is solid-solid colloid and gel is solid-liquid colloid D Sol is a liquid-solid colloid and gel is a solid-liquid colloid

6. In a water-sugar solution

A water is solute and sugar is solvent B water is solvent and sugar is solute C water is solute and water is also solvent D none of these

7. Boron and carbon are

A metalloids B metalloid and non-metal respectively C metal D non-metal and metalloid respectively

8. Which of the following methods would you use to separate cream from milk?

A Fractional distillation B Distillation C Centrifugation D Filtration

9. Cooking of food and digestion of food:

A are both physical processes B are both chemical processes C cooking is physical whereas digestion is chemical D cooking is chemical whereas digestion is physical

10. Mercury and bromine are both

A liquid at room temperature B solid at room temperature C gases at room temperature D both (a) and (b)