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Class 9 Science Chapter 2 Is Matter Around Us Pure Quiz 1 (60 MCQs)

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1. A mixture of two or more metals or a metal and non-metal is known as
2. The amount of solute present in the saturated solution at which no more solute can be added it is called .....
3. Heterogeneous mixture in which the solute particles do not dissolve and remain suspended throughout the solvent and the solute particles can be seen with the naked eye is known as:
4. Dispersed phase of gel is
5. Jelly is an example of which type of colloid?
6. What is the percentage by volume of nitrogen in atmosphere?
7. What is the mass of one mole of cane sugar? (Formula of cane sugar is C$_{12}$H$_{22}$O$_{11}$)
8. All matter is made up of
9. This is made up of one or more of the SAME kind of atom
10. Due to which property does a bell ring?
11. Name the waxy, transparent solid which changes from solid to gas.
12. Naphthalene and iron filings can be separated by the method of
13. Hard question. What is h2o
14. How many moles of NaCl are present in 6000. ml a 1.5 M NaCl solution?
15. Air is regarded as a mixture because:
16. For frictional distillation, the difference in their boiling points should be .....
17. .One common method used to separate dyes is:
18. Combination of two or more pure substances that are not chemically combined
19. Which of the following is true about solution
20. Which of the following is an example of a homogeneous substance?
21. Immiscible liquids separate out into layers depending on their
22. How many elements remain in the gaseous state at room temperature?
23. State True or False:Fine beam of light entering through a small hole in a dark room, illuminates the particles in its paths. This is because of Tyndall effect.
24. Find concentration of solution in which 10 g of sugar is dissolved in a solution of mass 100 g
25. How will you separate a mixture of petrol and water
26. True or False:There are only two elements which remain liquid at room temperature.
27. Which separation techniques will you apply for the separation of the Iron pins from sand?
28. The method used in washing machines to squeeze out water from wet clothes
29. Homogeneous mixtures can be called like this
30. Colloids get separated by a special technique called .....
31. Two miscible liquids having different boiling points can be separated by
32. Which flow chart correctly describes a homogeneous material?
33. Glass is a ..... Type of colloid.
34. A sample contains two substances and has uniform properties. The sample is:
35. It is a good conductor of heat.
36. By which method can potadh alum be purified?
37. The continuous zig-zag movement of colloidal particles in a dispersion medium is called
38. Which one of the following four statements is incorrect?
39. On converting 308K, 329K and 391K to Celsius scale, the correct sequence of temperature will be
40. A saturated salt water solution was heated and allowed to cool without adding any more salt. What will happen?
41. Air is ..... mixture.
42. Separation makes it possible to study and use the individual components of a mixture
43. Pumic stone is a solid sol.
44. How will you seperate the components of sugar solution?
45. Alloys are ..... mixtures of metals and cannot be separated into their components by physical methods
46. During summer days, water kept in an earthen pot becomes cool because of the phenomenon of
47. Q-8 Foam has ..... D.P & ..... D.M?
48. Rusting of iron is a chemical change.
49. A mixture of sulphur and carbon disulphide forms a homogeneous solution. What do we conclude from this statement?
50. Which of the following techniques is used in diagnostic lab for blood and urine test:
51. Water and alcohol are easily separated by distillation because of their
52. Filtration as a method of separation can be used for mixtures that are
53. Which of the following statements are true for pure substances?a)Pure substance contain only one kind of particles always.b)Pure substance may be compounds or mixturesc)Pure substance have the same composition throughoutd) compounds are also pure substances
54. If a substance consists of only one type of atom, what is it classified as?
55. Which of the following is an example of a solid-in-gas mixture?
56. When two liquids do not mix, they form two separate layers and are known as
57. Which method do we use to separate two miscible liquids?
58. What is the dispersion phase and medium of milk?
59. What happens to the solubility of most solutes as the temperature increases?
60. Rusting of an article made up of iron is called
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