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 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When the liquid is spun rapidly, the denser particles are forced to the bottom and the lighter particles stay at the top. This principle is used in: A) Centrifugation. B) Evaporation. C) Fractional distillation. D) Tunneling. Show Answer Correct Answer: A) Centrifugation. 2. Shaving foam is which type of colloid solution A) Sol. B) Foam. C) Aerosol. D) None of these. Show Answer Correct Answer: B) Foam. 3. DISPERSED PHASE IS SIMILAR TO A) SOLUTE. B) SOLVENT. C) IPL FIRST PHASE. D) IPL SECOND PHASE. Show Answer Correct Answer: A) SOLUTE. 4. In which of the following constituents are present in the ratio? A) Colloid. B) Mixture. C) Solution. D) Compound. Show Answer Correct Answer: B) Mixture. 5. ..... Elements are available in the nature. A) 63. B) 92. C) 114. D) None of the above. Show Answer Correct Answer: B) 92. 6. A solution contains 60g of NaCl in 340g of water. Calculate the concentration in terms of mass by mass % of the solution. A) 23%. B) 11.76%. C) 20%. D) 15%. Show Answer Correct Answer: D) 15%. 7. Which of the following substance will not dissolve in water? A) Carbon. B) Sodium Chloride. C) Sugar. D) Copper sulphate. Show Answer Correct Answer: A) Carbon. 8. There are two solutions A and B. Solution B contains 40 g of common salt in 210 g of water and solution A contains 80 g in 320 g of water. Which one will have more concentration of salt? A) Solution A. B) Solution B. C) Both will have same concentration. D) None of the above. Show Answer Correct Answer: A) Solution A. 9. When a saturated solution is heated and more solute is dissolved in it, what is such a solution called? A) Supersaturated Solution. B) Aqueous Solution. C) Colloidal Solution. D) Thermo Saturated Solution. Show Answer Correct Answer: A) Supersaturated Solution. 10. Changing the phase, size or shape of something ..... A) Chemical change. B) Colloid. C) Physical Change. D) Suspension. Show Answer Correct Answer: C) Physical Change. 11. A solution that contains a large amount of solute is best described as A) Weak. B) Concentrated. C) Dilute. D) Unsaturated. Show Answer Correct Answer: B) Concentrated. 12. A true solution is a A) Pure compound. B) Homogeneous mixture. C) Impure compound. D) Heterogeneous mixture. Show Answer Correct Answer: B) Homogeneous mixture. 13. What is the boling point of Argon? A) -196. B) -17. C) -186. D) -156. Show Answer Correct Answer: C) -186. 14. Which of these is a pair of isobars? A) $ _ {20} $ ca $^{40} $, $ _ {18} $ ar $ {40} $. B) $_{17}$Cl$^{35}$, $_{17}$Cl$^{37}$. C) $_{6}$C $^{12}$, $_{8}$O$^{16}$. D) $_{6}$C $^{13}$, $_{6}$C$^{14}$. Show Answer Correct Answer: A) $ _ {20} $ ca $^{40} $, $ _ {18} $ ar $ {40} $. 15. WHICH ONE IS A MIXTURE? A) SODIUM. B) CARBON DIOXIDE. C) BLOOD. D) SILICON. E) TIN. Show Answer Correct Answer: C) BLOOD. 16. How does loading tank help in purification of water? A) Allows to sediment the suspended impurities. B) Allows solids to settle. C) Allows Light solids to settle. D) None of the above. Show Answer Correct Answer: A) Allows to sediment the suspended impurities. 17. Elements are classified into three types. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. Sugar syrup, usually used to coat sweets with sugar, becomes hard when cooled. From this we can conclude that sugar syrup is A) A supersaturated solution. B) An unsaturated solution. C) Not a solution. D) None of the given options. Show Answer Correct Answer: A) A supersaturated solution. 19. What is dry ice? A) Ice having no water of crystallisation. B) Ice that has been dried. C) Solid Carbon dioxide. D) None of these. Show Answer Correct Answer: C) Solid Carbon dioxide. 20. Camphor is a sublimable substance. A) True. B) Fals. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 21. Amorphous solids: A) Are more flexible at higher temperature. B) Include glasses. C) Do not have specific melting point. D) All of these. Show Answer Correct Answer: D) All of these. 22. Which of the following substance differs (isolates)? A) Brass. B) Air. C) Sand. D) Graphite. Show Answer Correct Answer: D) Graphite. 23. What is ink composed of? A) Dye + Water. B) Dyestuff + Water. C) Colorant + Water. D) Color + Water. Show Answer Correct Answer: A) Dye + Water. 24. How many elements are naturally occurring? A) 92. B) 102. C) 93. D) 100. Show Answer Correct Answer: A) 92. 25. Cooking of food and digestion of food A) Are both physical processes. B) Are both chemical processes. C) Cooking is physical whereas digestion is chemical. D) Cooking is a chemical whereas digetion is physical. Show Answer Correct Answer: B) Are both chemical processes. 26. Which of the following property does not describe a compound? A) It is composed of two or more elements. B) It cannot be separated into constituents by physical means. C) It is mixed in any proportion by mass. D) It is a pure substance. Show Answer Correct Answer: C) It is mixed in any proportion by mass. 27. Motion of particles in a colloidal solution is called A) Oscillatory motion. B) Brownian motion. C) Circular motion. D) Rectilinear motion. Show Answer Correct Answer: B) Brownian motion. 28. Tyndall effect is observed in forests because of A) Tress. B) High oxygen level. C) Mist and dust particles in the air. D) Less sunlight. Show Answer Correct Answer: C) Mist and dust particles in the air. 29. WHAT IS THE SOLID CONTENT IN "TINCTURE OF IODINE" A) SOLID SOL. B) SOLID CARBON-DIOXIDE. C) IODINE. D) ALCOHOL. Show Answer Correct Answer: C) IODINE. 30. A mixture has two miscible liquids A and B. The boiling point of liquid A is 100 K and liquid B is 135 K. If you want to separate these, which separating method would you use? A) Fractional distillation. B) Simple distillation. C) Filtration. D) Sublimation. Show Answer Correct Answer: B) Simple distillation. 31. A solution contains 400 g of common salt in 3200 g of water. Calculate the concentration of salt in this solution in terms of mass percentage? A) 111.1%. B) 1.11%. C) 11.11%. D) 1.1%. Show Answer Correct Answer: C) 11.11%. 32. As air temperature increases, air can hold more water molecules, and its relative humidity decreases. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 33. A pure substance that cannot be broken down into other substances by chemical or physical means. A) Element. B) Atom. C) Compound. D) Mixture. Show Answer Correct Answer: A) Element. 34. Two substances A and B when bought together form a substance C with the evolution of heat. The properties of C are entirely different from those of A and B. the substance C is: A) A compound. B) An element. C) A mixture. D) None of the above. Show Answer Correct Answer: C) A mixture. 35. A component present in lesser quantity in solution called ..... A) Sugar. B) Solute. C) Mixture. D) Solvent. Show Answer Correct Answer: B) Solute. 36. Tincture of iodine is made by dissolving A) Iodine in alcohol. B) Iodine in water. C) Iodine in Vaseline. D) Iodine in potassium iodide. Show Answer Correct Answer: A) Iodine in alcohol. 37. ..... is the homogenous mixture of 2 or more substances A) Colloid. B) Tyndall Effect. C) Solution. D) Centrifugation. Show Answer Correct Answer: C) Solution. 38. I AM A COLLOID, NO ONE CAN SEE ME WITH A NAKED EYEI MAKE LIGHT VISIBLE WHEN IT PASSES THROUGH ME, BUT WHY?A SCIENTIST HAS FOUND A PROPERTY IN ME IT SEEMS IS ALSO HAPPENS WITH A TREEWHO AM I? A) SUSPENSION. B) COMPOUND. C) SOLUTION. D) COLLOID. Show Answer Correct Answer: D) COLLOID. 39. Tyndall effect is shown by A) Only solution. B) Only suspension. C) Only colloids. D) Both suspenion and colloids. E) Both suspension and true solution. Show Answer Correct Answer: D) Both suspenion and colloids. 40. By which process is the mixture of ammonium chloride and sand separated? A) Centrifugation. B) Sublimation. C) Evaporation. D) Winowing. Show Answer Correct Answer: B) Sublimation. 41. The component of solution which is being dissolved in the other component is called ..... A) Solvent. B) Concentration. C) Solubility. D) Solute. Show Answer Correct Answer: D) Solute. 42. When is fractional distillation used for separating two miscible liquids? A) More than 25 K. B) Less than 25 K. C) Equal to 25 K. D) -25 K. Show Answer Correct Answer: B) Less than 25 K. 43. A blue iris in an eye is blue due to A) Brownian Motion. B) Tyndall Effect. C) Electrophoresis. D) Centrifugation. Show Answer Correct Answer: B) Tyndall Effect. 44. Substance with atoms that are all alike. A) Homogeneous mixture. B) Compound. C) Element. D) Heterogeneous mixture. Show Answer Correct Answer: C) Element. 45. WHAT DID RBERT BOYLE DO? A) ELEMENT. B) COMPOUND. C) METAL. D) MALLEABILITY. Show Answer Correct Answer: A) ELEMENT. 46. What wood be matter A) A table. B) Apple. C) You. D) All of the above. Show Answer Correct Answer: D) All of the above. 47. Q-6 How many types of Colloidal Solutions are there? A) 7. B) 8. C) 2. D) 4. E) 10. Show Answer Correct Answer: B) 8. 48. Dissolved Sodium chloride can be separated from salt solution by A) Chemical process of extraction. B) Physical process of evaporation. C) Chemical processes. D) None of the above. Show Answer Correct Answer: B) Physical process of evaporation. 49. .A student is given a mixture of iron filings and sulphur in thee ratio 1:2 by weight. He was then asked to heat the mixture over a flame and to observe the olor change. The student will observe that the mixture becomes: A) Black. B) Grey. C) Yellow. D) Orange. Show Answer Correct Answer: A) Black. 50. Concentration of 36g of NaCl in 100 g of water is A) 21.11%. B) 26.47%. C) 29.32%. D) 23%. Show Answer Correct Answer: B) 26.47%. 51. What is the difference between a pure substance and a mixture? A) A pure substance can be separated into two or more substances, while a mixture cannot. B) A pure substance has a variable composition, while a mixture has a fixed composition. C) A pure substance has a fixed composition, while a mixture does not. D) A pure substance cannot be separated into two or more substances, while a mixture can. Show Answer Correct Answer: A) A pure substance can be separated into two or more substances, while a mixture cannot. 52. Colloids can be seperated by A) Sedimentation. B) Filtration. C) Distillation. D) Centrifugation. Show Answer Correct Answer: D) Centrifugation. 53. Which of the following is not a clue that a chemical change is taking place? A) Rapid release of energy (heat, light, or sound). B) Formation of bubbles. C) Phase change. D) Formation of a precipitate from solution. Show Answer Correct Answer: C) Phase change. 54. Impure salts can be purified by the process A) Fractional evaporation. B) Distillation. C) Fractional purification. D) Crysrallization. Show Answer Correct Answer: D) Crysrallization. 55. True or False:Gallium and Cesium do not become liquid slightly above room temperature. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 56. In tincture of iodine, iodine is added as solute to which solvent? A) Oil. B) Milk. C) Alcohol. D) None of the above. Show Answer Correct Answer: C) Alcohol. 57. How many moles are contained in 180 grams of water? A) 100. B) 0.1. C) 180. D) 10. Show Answer Correct Answer: D) 10. 58. What is the characteristic of a pure substance? A) It has a fixed composition. B) It can be separated into two or more substances. C) It is made up of a single element. D) It is made up of multiple elements. Show Answer Correct Answer: C) It is made up of a single element. 59. THE CONCENTRATION OF A SOLUTION DEPENDS ON ..... A) AMOUNT OF SOLVENT. B) SOLUBILITY. C) AMOUNT OF SOLUTE. D) SATURATION. Show Answer Correct Answer: C) AMOUNT OF SOLUTE. 60. Assertion (A):Wood is not considered as a compound whereas Water is. Reason (R):Water is contains more than two types of elements. 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: B) Both a and R are true but R is not the correct explanation of the A. ← 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 5Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 7 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books