CLASS 9 IS MATTER AROUND US PURE?

1. Which one of the following does not form true solution in water

  a. common salt b. alum c. albumin d. cane sugar

2. Which one of the following forms a colloid in water

  a . common salt b. alum c. albumin d. cane sugar

3.. Which one of the following forms a colloid in water

  a. soil b. sand c. chalk powder d .none of these

4. Which one of the following is highly soluble in water

  a. common salt b. potash alum c. cane sugar d. starch

5. Which one of the following does not form true solution in water at room temperature .

  a.common salt b. alum c. albumin d. cane sugar

6. Which one of the following is least soluble in water

  a. common salt b. potash alum c. cane sugar d. starch

7.Which one of the following can be separated by filtration

  a. common salt and water b. sugar and water

  c. soil and water d. starch and water

8. In which one of the following the particle size is in the range of 0.1 nm to 1.0 nm

  a. true solution b . suspension c. colloid d. none of these

9. Which one of the following forms a colloid in water

  a. sugar b. sand c. chalk powder d. none of these

10.Tyndall effect is observed in which one of the following

  a. true solution b . suspension c. colloid d. none of these

11.Sedimention does not take place in which one of the following

  a. common salt and water b. sugar and water

  c. soil and water d. starch and water

12.Which one will boil at a constant temperature ?

  a. true solution b. colloid c. compound d. each one ..

13.Which represents a constant composition

  a. true solution b. colloid c. suspension d.. none of these

1.  What is tincture of iodine?

2  what kind of mixtures are separated by techniques of crystallization?

3.  State the principle for separation of immiscible liquids?

4.  Why a mixture is an impure substance?

5.  Define aerosol.

6.  What is meant by solubility of a solute?

7.  How to differentiate between sol, solution and suspension?

8.  What is meant by chromatography?

9.  Define emulsion with example.

10.  How to separate ammonium chloride+ sodium chloride. Explain briefly.