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yndall, , 14., , , , Brownian move, 2 a ovement is observed in y, , , , and water, , , , Which one af a, en one of the following is least solut, 2 St soluble in, (a) Starch, , (¢) Potash alum, , (b) Common salt, , (d) Cane sugar., , Which one is, sa rec t, correct statement about a colloid of egg albumin in water ?, , Its particles can be seen by naked eye, , , , fb) It, (b) Its components can be separated by filtration, , , , (c) It shows Tyndall effect, (d) It is not stable., What is the mass per cent of the solvent in a true solution in which the mass per cent of the solute 's \O2, (a) 90 (b) 100, (d) 60., e student observed that, , , , (c) 80, A student was asked to mix the white of an egg with water and stir well., (b) A translucent mixture is formed, , (a) A transparent solution is formed, (d) Egg white floats on the surface., , (c) Egg white settles down at the bottom

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(a) Homogeneous (b) Heterogeneous, , (c) None of these (d) Both (a) and (b)., 22. Which of the following is transparent :, , (a) True solution (b) Colloidal solution, , (c) Suspension (d) None of these., 23. Which of the following is a true solution ?, , (a) Vinegar solution (b) Blood, , (c) Muddy water (d) Aluminium paint., , 24. Which of the following represents correct procedure for filtration :, , , , , , , , , , , , , , , , , , , , , , , , , , , , , rol ulxict hij de Ay 14, Gl git io.ctectt airtvegge(

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Residue Fitter, " s rca wl, 31. The liquid should be poured into the filter cone iad?, (a) The glass rod in the centre of cone () Glass rod pressed against the edge of cone, (c) Glass rod (@) Test tube., 32. The Brownian movement in colloids is because of :, (a) Charge on colloidal solution, (b) Collisions between colloidal particles and with dispersion medium, (c) Tyndall effect, (d) All of these., 33. The particles of which of following settle on centrifugation :, (a) Colloidal solution (b) True solution, (c) Suspension (d) None of these., 34. The path of light is clearly visible in which of the following :, (a) Colloidal solution (b) Suspension, (c) True solution, 35. Which of the following is most stable?, , Vy; : Cae? v wath’

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12 (d) 13. (b) 1%. (DB), , 17. (b) 18 (d) 19 (a) 26.6 fey aS 22. (d) 23. (a), , ~¢ \Y/} wy. (Cc) it {c), , Matter in Our Surroundings, Vv, , One Mark Questions, |. In which one of the following substances the number of molecules of water of crystal, (b) Sugar, , (d) Common salt, , , , (a) Potash alum, , (c) Mohr’s salt, 2. Which one of the following will form colloidal solution in water?, , (a) Starch (b) Fine sand, , (c) Sugar (d) Common salt., , 3. Which one of the following sets contains the same type of systems?, (b) Gel, cheese, soil, , (a) Milk, emulsion, salt, (d) Shoe polish, butter, paint., , (c) Fog, milk, alum, , 4. Asystem ofa solid in a liquid is stable, its components cannot be separated by filtration and it shows Tynd, effect. This system represents:, (a) True solution :, (c) Suspension, , (b) Colloid, (d) None. Tike