This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Science > Is Matter Around Us Pure > Class 9 Science Chapter 2 Is Matter Around Us Pure – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Name the process associated when dry ice is kept at room temperature and at one atmospheric pressure. A) Centrifugation. B) Evaporation. C) Sublimation. D) Sedimentation. E) Dissolution. Show Answer Correct Answer: C) Sublimation. 2. Mixtures of two or more metals, or metals and non-metals are ..... A) Alloys. B) Mixtures. C) Metallic mixture. D) None of the above. Show Answer Correct Answer: A) Alloys. 3. What is the opposite of 'pure' in Chemistry? A) Compound. B) Homogeneous. C) Heterogeneous. D) Elementary. Show Answer Correct Answer: C) Heterogeneous. 4. Type of mixture that doesn't separate on its own but still contains undissolved particles A) Solution. B) Colloid. C) Suspension. D) None of the above. Show Answer Correct Answer: B) Colloid. 5. Purity of a solid substance can be checked by its: A) Solubility in alcohol. B) Melting point. C) Boiling point. D) Solubility in water. Show Answer Correct Answer: B) Melting point. 6. A solution for making tea contains 20 g of sugar in 150 ml of water. Find the concentration of solution. A) 12.5%. B) 14%. C) 13.3%. D) 14.3%. Show Answer Correct Answer: C) 13.3%. 7. Alum is generally used in which of the following separating technique? A) Fractional distillation. B) Centrifugation. C) Chromatography. D) Loading. Show Answer Correct Answer: D) Loading. 8. Sugar water is a A) Solution. B) Suspension. C) Colloid. D) None of the above. Show Answer Correct Answer: A) Solution. 9. Suspended particlers cannot be seen by naked eyes. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 10. In air, ..... Is a solvent. A) Nitrogen. B) Oxygen. C) Argon. D) None of the above. Show Answer Correct Answer: A) Nitrogen. 11. Tincture of iodine has antiseptic properties. This solution is made bydissolving A) Iodine in potassium iodide. B) Iodine in vaseline. C) Iodine in water. D) Iodine in alcohol. Show Answer Correct Answer: D) Iodine in alcohol. 12. Which of the following is not a compound? A) Ozone. B) Graphite. C) Nitrogen. D) All of these. Show Answer Correct Answer: D) All of these. 13. Dissolved sodium chloride can be separated from water by ..... A) Physical process. B) Physical process of evaporation. C) Chemical process. D) Chemical process of extraction. Show Answer Correct Answer: B) Physical process of evaporation. 14. Which of the following mixtures will be the most difficult to separate? A) Iron filings + sand. B) Sand + water. C) Sawdust + stones. D) Nitrogen + hydrogen. Show Answer Correct Answer: D) Nitrogen + hydrogen. 15. According to the definition of pure substance, which of the following is a pure substance? A) Ice. B) Mercury. C) Iron. D) All of these. Show Answer Correct Answer: D) All of these. 16. WHAT IS THE PERCENTAGE OF COMPOSITION OF O$_{2 }$+ N$_{2}$ A) 96%. B) 93%. C) 99%. D) 97%. Show Answer Correct Answer: C) 99%. 17. The solution of copper sulphate do not show tyndall effect. It means it is a type of ..... A) Solution. B) Colloid. C) Concentration. D) Suspension. Show Answer Correct Answer: A) Solution. 18. Which of the following provides an example of a true solution? A) Sugar solution. B) Milk. C) Blood. D) Starch solution. Show Answer Correct Answer: A) Sugar solution. 19. Which of the following is considered to be a pure substance? A) Milk of magnesia. B) Granite. C) Sodium chloride. D) Muddy water. Show Answer Correct Answer: C) Sodium chloride. 20. Pick the heterogeneous mixture among the following A) Smoke. B) Brass. C) Salt solution. D) Sugar solution. Show Answer Correct Answer: A) Smoke. 21. Find thehomogeneous group from the following materials:Soda water, wood, air, soil, vinegar, filtered tea A) Wood, soil, filtered tea. B) Air, vinegar, filtered tea. C) Wood, soil, air,. D) Soda water, air, vinegar. Show Answer Correct Answer: D) Soda water, air, vinegar. 22. Which is more effective in cooling? A) Ice at 373K. B) Ice at 273K. C) Water at 373K. D) Water at 273K. Show Answer Correct Answer: D) Water at 273K. 23. The amount of the solute present in the saturated solution at this temperature is called its ..... A) Collusion. B) Solubility. C) Diffusion. D) Unsaturation. Show Answer Correct Answer: B) Solubility. 24. How is salt separated from sea water without any impurities? A) Evaporeation. B) Evaporation. C) Crystallisation. D) Crystallization. Show Answer Correct Answer: D) Crystallization. 25. Which of the following is a mixture? A) Mercury. B) Air. C) Hydrochloric acid. D) Ice. Show Answer Correct Answer: B) Air. 26. Which of the following is an example of a heterogeneous substance? A) Bottled water. B) Table salt. C) Pieces of copper. D) Candle. Show Answer Correct Answer: D) Candle. 27. Boiling point of Nitrogen is ..... deg C. A) -190. B) -183. C) -186. D) -196. Show Answer Correct Answer: D) -196. 28. The particles of colloid are in state of continuous zig-zag motion. It is known as ..... A) Osmosis. B) Diffusion. C) Kinetic energy. D) Brownian motion. Show Answer Correct Answer: D) Brownian motion. 29. What type of mixture separates upon standing? A) Solution. B) Alloy. C) Colloid. D) Suspension. Show Answer Correct Answer: D) Suspension. 30. ..... MAKES IT POSSIBLE TO STUDY AND USE THE INDIVIDUAL COMPONENTS OF A MIXTURE. A) SIZE OF PARTICLES. B) ELECTRON MICROSCOPE. C) SEPERATION TECHNIQUES. D) BASIC MICROSCOPE. Show Answer Correct Answer: C) SEPERATION TECHNIQUES. 31. Which changes of state occur during distillation? A) Boiling followed by filtration. B) Boiling followed by condensation. C) Filtration followed by boiling. D) Condensation followed by boiling. Show Answer Correct Answer: B) Boiling followed by condensation. 32. , brass is a mixture of approximately ..... zinc and 70% copper. A) 60%. B) 30%. C) 100%. D) 40%. Show Answer Correct Answer: B) 30%. 33. One of the following does not undergo sublimation. This one is A) Ammonium chloride. B) Sodium chloride. C) Camphor. D) Iodine. Show Answer Correct Answer: B) Sodium chloride. 34. What Happens to the vapours of the liquid in fractionating column? A) Condense. B) Solidify. C) Cool. D) Both 1 & 3. Show Answer Correct Answer: D) Both 1 & 3. 35. Q-3 A solution has a ..... & a ..... as it's components. A) Solute & Solvent. B) True & Colloid. C) Mixture & Solution. D) All of the above. Show Answer Correct Answer: A) Solute & Solvent. 36. A mixture of dye in a volatile liquid can be separated by? A) Evaporation. B) Filtration. C) Chromatography. D) Sedimentation. Show Answer Correct Answer: C) Chromatography. 37. Identify the dispersed phase and dispersed medium in the Shaving cream an example of Foam Colloid. A) Dispersed phase = LiquidDispersed Medium = Gas. B) Dispersed phase = LiquidDispersed Medium = Liquid. C) Dispersed phase = GasDispersed Medium = Gas. D) Dispersed phase = GasDispersed Medium = Liquid. Show Answer Correct Answer: D) Dispersed phase = GasDispersed Medium = Liquid. 38. Assertion:True solution exhibits Tyndall effect.Reason:Particles are very large in size. A) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). B) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A). C) Assertion (A) is true but reason (R) is false. D) Assertion (A) is false but reason (R) is true. Show Answer Correct Answer: D) Assertion (A) is false but reason (R) is true. 39. Cheese is an emulsion type of colloid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 40. Made up of one kind of matter and has a definite set of properties A) Atom. B) Pure substance. C) Mixture. D) Compound. Show Answer Correct Answer: B) Pure substance. 41. In which of the following-the solute is liquid but the solvent is solid? A) Air containing moisture. B) Adsorption of H$_{2}$ gas in Pd. C) Zinc amalgam. D) Homogeneous mixture of water and ethanol. Show Answer Correct Answer: C) Zinc amalgam. 42. ..... is a substance composed of two or more elements, chemically combined with one another in a fixed proportion. A) Alloys. B) Suspension. C) Element. D) Compound. Show Answer Correct Answer: D) Compound. 43. How many free surfaces exist in the case of solids? A) Infinitely many. B) 1. C) 3. D) 2. Show Answer Correct Answer: A) Infinitely many. 44. The approximate proportion of zinc in brass is ..... %. A) 20. B) 30. C) 70. D) None of the above. Show Answer Correct Answer: B) 30. 45. Air is regarded as mixture because? A) Volume changes under different compositions. B) It's pressure may vary. C) It's compositions may vary. D) It's temperature may vary. Show Answer Correct Answer: C) It's compositions may vary. 46. How will you separate the components of sugar solution A) Evaporation. B) Crystallization. C) Filtration. D) Chromatography. Show Answer Correct Answer: B) Crystallization. 47. Which of the following will show the "Tyndall effect" ? (a) Salt solution (b) Milk (c) Copper sulphate solution (d) Starch solution A) Salt solution, Milk. B) Salt solution, Copper sulphate solution. C) Milk, Starch solution. D) Copper sulphate solution, Starch solution. Show Answer Correct Answer: C) Milk, Starch solution. 48. Coloured gemstone is an example of A) Gel. B) Aerosol. C) Solid Sol. D) Emulsion. Show Answer Correct Answer: C) Solid Sol. 49. CO2 would be a ..... A) Compound. B) Molecule. C) Compound AND Molecule. D) Element. Show Answer Correct Answer: C) Compound AND Molecule. 50. A solution contains 80 g of common salt in 640 g of water.Calculate the concentration in terms of mass by mass percentage of the solution. A) 11.1 %. B) 11 %. C) 22.2 %. D) 7.7%. Show Answer Correct Answer: A) 11.1 %. 51. Elements and Compounds do not fall under the category of: A) Pure Substances. B) Mixtures. C) All the above. D) None of the above. Show Answer Correct Answer: B) Mixtures. 52. HOW MANY ELEMENTS ARE GASEOUS STATE AT TEMPERATURE BETWEEN 20*C-25*C A) 11. B) 19. C) 4. D) 7. Show Answer Correct Answer: A) 11. 53. What is the state of the solute and solvent in solution of hydrogen and palladium? A) Solute = Gas, Solvent = Solid. B) Solute = Liquid, Solvent = Gas. C) Solute = Solid, Solvent = Gas. D) Solute = Gas, Solvent = Liquid. Show Answer Correct Answer: A) Solute = Gas, Solvent = Solid. 54. Identify the chemical change A) Burning of coal. B) Melting of ice. C) Tearing paper. D) MIxing salt and sand. Show Answer Correct Answer: A) Burning of coal. 55. When size of a particle in a mixture is less than 1 nanometre, that mixture is an example of ..... A) Pure substance. B) Colloid. C) Solution. D) Suspension. Show Answer Correct Answer: C) Solution. 56. Which of these is a chemical change? A) Squeezing sponge. B) Breaking glass. C) Growing of humans. D) Tearing of paper. Show Answer Correct Answer: C) Growing of humans. 57. Q-4 The component of a solution that dissolves the other component is called as ..... ? A) Not able to answer!!!!!!!!!. B) Solute. C) Solution. D) Solvent. Show Answer Correct Answer: D) Solvent. 58. What is the smell of hydrogen sulphide? A) Rotten Vegetables. B) Odourless. C) Rotten eggs. D) None of these. Show Answer Correct Answer: C) Rotten eggs. 59. Which of the following statements tells us that a sample of liquid is pure water? A) It is odourless. B) It boils at 100$^{o}$C. C) It leaves no residue when filtered. D) It is colourless. Show Answer Correct Answer: B) It boils at 100$^{o}$C. 60. Is matter around us really pure? A) For sure yes!. B) Contains Mixtures As well as pure substances but more of them are mixtures. C) Maybe Not. D) I am Not so sure. Show Answer Correct Answer: B) Contains Mixtures As well as pure substances but more of them are mixtures. ← PreviousNext →Related QuizzesScience QuizzesClass 9 QuizzesClass 9 Science Chapter 2 Is Matter Around Us Pure Quiz 1Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 2Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 3Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 4Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 6Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 7 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books