Page 1 :
Matter in Our Surroundings, MKU, 2., One Mark Questions, (a) Potash alum, 1. In which one of the following substances the number of molecules of water of crystallization is 24?, Jeans (a), (c) Mohr's salt, 2. Which one of the following will form colloidal solution in water?, (c) Common salt., (a) Starch, (b) Fine sand, (d) Common salt., (c) Sugar, 3. Which one of the following sets contains the same type of systems?, (a) Milk, emulsion, salt, (b) Gel, cheese, soil, (c) Fog, milk, alum, 4. A system of a solid in a liquid is stable, its components cannot be separated by filtration and it shows Tyndal, effect. This system represents:, (d) Shoe polish, butter, paint., ()juqu conuco, (d) None., (b) Collaid, (a) True solution, uojsuadsng (2)

Page 2 :
(C) Suspension, sol, solution, (D) S01, suspension, solution, (d) Suspension, solution, sol., 9. Aqueous solution of which one of the following substances contains molecules only., (a) Common salt, (c) Potash alum, 10. Brownian movement is observed in which one of the following ?, (b) Potassium chloride, (d) Urea., (a) Starch and water, (c) Alum and water, (b) NaCl and water, (d) True solution., II. Which one of the following is least soluble in water ?, (a) Starch, (c) Potash alum, (b) Common salt, (d) Cane, sugar., 12. Which one is a correct statement about a colloid of egg albumin in water?, (a) Its particles can be seen by naked eye, (b) Its components can be separated by filtration, (c) It shows Tyndall effect, (d) It is not stable., 13. What is the mass per cent of the solvent in a true solution in which the mass per cent of the solute is 10?, (b) 100, (a) 90, (d) 60., (c) 80, dll, 14. A student was asked to mix the white of an egg with water and stir well. The student observed that:, (b) A translucent mixture is formed, (a) A transparent solution is formed, (c) Egg white settles down at the bottom, (d) Egg white floats on the surface.

Page 3 :
entify the, (a), 45. (a), 46. (a)., 3, Mixtures and Compounds, esidue and, urlglue bos, One Mark Questions, I. Which of the following has constant composition at all termperatures ?, (a) Compound, (c) True solution, (b) Mixture, (d) Colloid., 2. Heat energy is evolved or absorbed during the formation of., (b) True solution, (a) Colloid, (c) Compound, 3. Which one of the following is an example of heterogeneous mixture?, (d) All., ogmoo 2 mo, (b) Alum + water, (a) Kerosene + water, (a) Sugar + water., (c) NaCl + water

Page 5 :
202, MBD Super Refresher Science-Y, 15. Which one is not a correct statement about a true solution of potash alum in water ?, (a) It is not transparent and it is not stable, (b) It does not show Tyndall effect, (c) Its particles can be be seen by naked eye, (d) Its components cannot be separated by filtration., 16. Which one of the following will show Tyndall effect ?, (a) Sulphur in water, (c) Copper sulphate solution, 17. Which of the following is the property of true solution?, (a) Homogeneous, (c) Translucent, 18. Which one of the following will form a colloidal solution in water ?, (a) Soil, (c) Starch, 19. Tyndall effect is observed in which one of the following?, (b) Milk, (d) Salt solution., (b) Heterogeneous, (d) None of these., (b) Sand, (d) None., (a) True solution, (b) Albumin + water, (c) Alum + water, (d) NaCi + water., 20. The particles of true solution:, (a) Are visible with powerful microscope, (c) Are visible with naked eye, (6) Cannot be seen even with microscope, (d) None of these., 21. The suspension is:, (a) Homogeneous, (c) None of these, 22. Which of the following is transparent:, (b) Heterogeneous, (d) Both (a) and (b)., to9 (), wng Gf, (a) True solution, (c) Suspension, 23. Which of the following is a true solution ?, (b) Colloidal solution, (d) None of these., (a) Vinegar solution, (c) Muddy water, 24. Which of the following represents correct procedure for filtration:, (b) Blood, (d) Aluminium paint., IV, (a) IV, (b) ||, (d) I., (c)