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 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following are homogeneous in nature? A) Ice. B) Wood. C) Sugar and sand. D) Concrete. Show Answer Correct Answer: A) Ice. 2. Centrifugation technique is mostly preferred for: A) Solutions. B) Colloids. C) Suspensions. D) All the above. Show Answer Correct Answer: B) Colloids. 3. Air is regarded as a mixture because ..... (two or more options might be correct) A) Its temperature may change. B) Its pressure may vary. C) Its composition may vary. D) Its volume changes under different conditions. Show Answer Correct Answer: C) Its composition may vary. 4. The solubility of a salt in water is 20g/100g at 25C. It increases 10% for every 5C rise of temperature upto 50C and then becomes constant. A solution of 26g of the same salt in 100g of water at 35C would be A) Translucent. B) Colloidal. C) Saturated. D) Unsaturated. Show Answer Correct Answer: C) Saturated. 5. Boron and carbon are A) Metalloids. B) Metalloid and non-metal respectively. C) Metal. D) Non-metal and metalloid respectively. Show Answer Correct Answer: B) Metalloid and non-metal respectively. 6. In which of the following is Tyndall effect seen? A) Lemon juice. B) Milk. C) Solution of copper sulphate (blue vitrol). D) Solution of common salt. Show Answer Correct Answer: B) Milk. 7. In ..... The path of light is not visible. A) Solution. B) Colloid. C) Suspension. D) None of the above. Show Answer Correct Answer: A) Solution. 8. The name of scientist who discovered Brownian motion is ..... A) Robert Hook. B) Robert Brown. C) Antoine Lavoisier. D) Robert Boyle. Show Answer Correct Answer: B) Robert Brown. 9. What was chromatography used for at the initial stage? A) For coloring on dress. B) For separation of colors. C) For dilution of colors. D) None of the above. Show Answer Correct Answer: B) For separation of colors. 10. ASSERTION:CRYSTALLISATION IS USED TO EXTRACT SALT FROM SEA WATER.REASON:EVAPORATION MAY GET SOME SOLID CHARRED A) ASSERTION (A) AND REASON (R) ARE CORRECT AND REASON (R) IS THE CORRECT EXPLANATION OF ASSERTION (A). B) ASSERTION (A) AND REASON (R) ARE CORRECT AND REASON (R) IS NOT THE CORRECT EXPLANATION OF ASSERTION (A). C) ASSERTION (A) IS TRUE AND REASON (R) IS FALSE. D) ASSERTION (A) IS FALSE REASON (R) IS TRUE. Show Answer Correct Answer: A) ASSERTION (A) AND REASON (R) ARE CORRECT AND REASON (R) IS THE CORRECT EXPLANATION OF ASSERTION (A). 11. A solution contains 50g of sugar and 450ml of water. Calculate the mass by volume % of the solution. A) 10%. B) 50%. C) 11.11 %. D) 20.11%. Show Answer Correct Answer: A) 10%. 12. Air is regarded as a- A) Mixture. B) Element. C) Compound. D) Alloy. Show Answer Correct Answer: A) Mixture. 13. Which of the following apparatus is not required in sublimation? A) Funnel. B) Condenser. C) Wire gauze. D) China Dish. Show Answer Correct Answer: B) Condenser. 14. Which of the following element is not a metalloid? A) Boron. B) Silicon. C) Tantasts. D) Germanium. Show Answer Correct Answer: C) Tantasts. 15. What type of solution is required for crystallizaton? A) Unsaturated. B) Super saturated. C) Diluted. D) None of the above. Show Answer Correct Answer: D) None of the above. 16. Tyndall effect means A) Rays scattered by dust particles. B) Rays travelling from one medium to other. C) Rays undergoing Refraction. D) Rays undergoing totally reflected. Show Answer Correct Answer: A) Rays scattered by dust particles. 17. Which of the following is a separation technique for the separation of salt and ammonium chloride crystals? A) Sublimation. B) Fractional Distillation. C) Filtration. D) Centrifugation. Show Answer Correct Answer: A) Sublimation. 18. Q-1 By which Physical process we can Separate (NaCl) Sodium-Chloride from (H$_{2}$O) Water? A) Filtration. B) Burning. C) Evaporation. D) Separating-Funnel. Show Answer Correct Answer: C) Evaporation. 19. Which separation technique will you use to separate a mixture of two immiscible liquids using difference in densities as a deciding factor? A) Chromatography. B) Separating funnel. C) Fractional distillation. D) Filtration. Show Answer Correct Answer: B) Separating funnel. 20. Which of the followong will not show Tyndall effect? A) Smoke. B) Salt. C) Jelly. D) Foam. Show Answer Correct Answer: B) Salt. 21. The process of removing impurities from a solution by using filter paper is called as A) Filtration. B) Chromatography. C) Solution. D) Sublimation. Show Answer Correct Answer: A) Filtration. 22. What type of a colloid is smoke? A) Aerosol. B) Gels. C) Sols. D) Foam. Show Answer Correct Answer: A) Aerosol. 23. ..... CONTAINS TINY DROPLETS OF WATER, WHICH ACT AS PARTICLES OF COLLOID. A) PUMICE. B) MIST. C) EMULSION. D) AEROSOL. Show Answer Correct Answer: B) MIST. 24. Which of the following are chemical changes?(i) Decaying of wood(ii) Burning of wood(iii) Sawing of wood(iv) Hammering of a nail into a piece of wood A) (i) and (ii). B) (ii) and (iii). C) (iii) and (iv). D) (i) and (iv). Show Answer Correct Answer: B) (ii) and (iii). 25. WHAT IS THE SIZE OF THE PARTICLES OF A SUSPENSION?/ A) MORE THAN 100nm. B) Less than 1nm. C) Less than 1nm. D) None of the above. Show Answer Correct Answer: A) MORE THAN 100nm. 26. Component present in large amount in solution called ..... A) Solute. B) Mixture. C) Solvent. D) Sugar. Show Answer Correct Answer: C) Solvent. 27. Which of the following are physical changes?(i) Melting of iron metal(ii) Rusting of iron(iii) Bending of an iron rod(iv) Drawing a wire of iron metal A) (i), (ii) and (iii). B) (i), (ii) and (iv). C) (i), (iii) and (iv). D) (ii), (iii) and (iv). Show Answer Correct Answer: A) (i), (ii) and (iii). 28. Purified water is a A) Compound. B) Mixture. C) Atom. D) Element. Show Answer Correct Answer: A) Compound. 29. What are the two components of a Colloid? A) Solvent, Solute. B) Dispersed Phase, Dispersion Medium. C) Sugar, Water. D) Salt, Water. Show Answer Correct Answer: B) Dispersed Phase, Dispersion Medium. 30. Smell of Hydrogen sulfide gas A) Pleasant. B) Sweet. C) Burning tyre. D) Rotten eggs. Show Answer Correct Answer: D) Rotten eggs. 31. A mixture of common salt, sulphur, sand and iron filings is shaken with carbon disulphide and filtered through a filter paper. The filtrate is evaporated to dryness in a china dish. What will be left in the dish after evaporation? A) Sand. B) Sulphur. C) Iron filings. D) Common salt. Show Answer Correct Answer: B) Sulphur. 32. Brass is an alloy. It is a mixture of ..... A) 30% Zinc 70% copper. B) 40% iron 80% copper. C) 20% copper 80% nickel. D) 35% gold 65% zinc. Show Answer Correct Answer: A) 30% Zinc 70% copper. 33. What are the 3 states of mater A) Rada. B) Matter. C) Air solid gas. D) Solid liquid gas. Show Answer Correct Answer: D) Solid liquid gas. 34. ASSERTION:CONCENTRATION DEPENDS ON ( MASS OF SOLUTE / MASS OF SOLUTION X 100 )REASON:IT IS A FORMULA USED TO FIND CONCENTRATION OF A SOLUTION A) A AND R ARE TRUE AND R IS THE CORRECT EXPLANATION OF A. B) A AND R ARE TRUE AND R IS NOT THE CORRECT EXPLANATION OF A. C) A IS FALSE AND R IS TRUE. D) R IS FALSE AND A IS FALSE. Show Answer Correct Answer: A) A AND R ARE TRUE AND R IS THE CORRECT EXPLANATION OF A. 35. Melting butter is an example of A) Physical change. B) Chemical change. C) All the above. D) None of the above. Show Answer Correct Answer: A) Physical change. 36. Sodium carbonate is A) An element. B) A compound. C) A mixture. D) None of these. Show Answer Correct Answer: B) A compound. 37. Particles size of solution A) Less than 1 nm. B) More than 1 nm. C) Between 1 and 1000 nm. D) More than 1000 nm. Show Answer Correct Answer: A) Less than 1 nm. 38. How is iron separated from its ore? A) Filtration. B) Centrifugation. C) Evaporation. D) Separating funnel. Show Answer Correct Answer: D) Separating funnel. 39. Which has the largest particles? A) Solution. B) Colloids. C) Suspension. D) None of the above. Show Answer Correct Answer: C) Suspension. 40. A mixture of methyl alcohol and acetone can be separated by: A) Distillation under reduced pressure. B) Fractional distillation. C) Fractional distillation. D) Distillation. Show Answer Correct Answer: B) Fractional distillation. 41. Which of these show the tyndall effect? A) Suspensions. B) Colloids. C) Any heterogeneous mixtures. D) Solutions. Show Answer Correct Answer: B) Colloids. 42. The Tyndall Effect is not visible in which of the following? A) Solution. B) Colloid. C) Heterogeneous Mixture. D) Suspension. Show Answer Correct Answer: A) Solution. 43. When the same amount of Zn is treated separately with excess of dil. H$_{2}$SO4 and excess of NaOH, what is the ratio of volumes of H$_{2}$ evolved? A) 1:1. B) 1:2. C) 2:1. D) 9:4. Show Answer Correct Answer: A) 1:1. 44. You are given a black ink and you want to find out the different dyes present in it. Which separation technique will you use? A) Fractional distillation technique. B) Chromatography technique. C) Centrifugation technique. D) Separating cylinder technique. Show Answer Correct Answer: B) Chromatography technique. 45. Which of the following is jelly? A) Ghee. B) Sponge. C) Milk. D) Butter. Show Answer Correct Answer: D) Butter. 46. Which of the following is a true solution? A) Salt solution. B) Milk. C) Blood. D) Chalk powder in water. Show Answer Correct Answer: A) Salt solution. 47. A compound can have variable composition. A) False. B) Sometimes. C) True. D) Wrong Question. Show Answer Correct Answer: A) False. 48. Particles of which are visible to naked eyes A) Mixture. B) Colloidal solution. C) Suspension. D) None of the above. Show Answer Correct Answer: C) Suspension. 49. Milk is a ..... solution while vinegar is a ..... solution A) Colloid, true. B) True, colloid. C) Colloid, suspension. D) Suspension, colloid. Show Answer Correct Answer: A) Colloid, true. 50. What is the solute in the soda water? A) Sugar. B) Water. C) Carbon dioxide. D) Oxygen. Show Answer Correct Answer: C) Carbon dioxide. 51. Select a heterogeneous mixture out of the following A) Air. B) NaCl in water. C) Emulsion. D) Alloy. Show Answer Correct Answer: C) Emulsion. 52. In a sugar solution that has sugar and water mixed what is the solute A) Water. B) Sugar. C) I don't know. D) None of the above. Show Answer Correct Answer: B) Sugar. 53. Assertion (A):After heating Iron fillings and Sulphur powder together, the substance so formed loses it's magnetism.Reason (R):The substance so formed is a homogeneous mixture. A) Both A and R are true and R is the correct explanation of A. B) Both a and R are true but R is not the correct explanation of the A. C) A is true and R is false. D) A is false and R is true. Show Answer Correct Answer: C) A is true and R is false. 54. Which of the following is a compound? A) Graphite. B) Hydrogen sulphide. C) Stainless steel. D) Bronze. Show Answer Correct Answer: B) Hydrogen sulphide. 55. Of what is a shaving cream a colloid? A) Liquid in solid. B) Liquid in liquid. C) Gas in liquid. D) Gas in solid. Show Answer Correct Answer: C) Gas in liquid. 56. Arsenic can be purified by? A) Sublimation. B) Distillation. C) Chromatography. D) Crystallization. Show Answer Correct Answer: A) Sublimation. 57. Centrifugation technique can only work on: A) Homogeneous mixture. B) Heterogeneous mixture. C) All the above. D) None of the above. Show Answer Correct Answer: B) Heterogeneous mixture. 58. What are the boiling points of Alcohol and Water? A) Alcohol = 78C, Water = 200C. B) Alcohol = 79C, Water = 200C. C) Alcohol = 78C, Water = 100C. D) Alcohol = 79C, Water = 100C. Show Answer Correct Answer: C) Alcohol = 78C, Water = 100C. 59. Which of the following statements are true for pure substances?(i) Pure substances contain only one kind of particles(ii) Pure substances may be compounds or mixtures(iii) Pure substances have the same composition throughout(iv) Pure substances can be exemplified by all elements other than nickel A) (i) and (ii). B) (i) and (iii). C) (iii) and (iv). D) (ii) and (iii). Show Answer Correct Answer: B) (i) and (iii). 60. A mixture of salt in water does not allow light to scatter when passed through it. It is a ..... A) Pure substance. B) Solution. C) Colloid. D) Suspension. Show Answer Correct Answer: B) Solution. ← 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 5Class 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