Class 9 Science Is Matter Around Us Pure MCQ ?

Class 9 Science Is Matter Around Us Pure MCQ ?

1. Which of the following is not an element?

(A) graphite

(B) germanium

(C) silica

(D) silicon

Correct Answer: (C)

2. Which of the following are compounds?

(i) CO

(ii) Na

(iii) NO

(iv) Co

(A) (i) and (ii)

(B) (ii) and (iii)

(C) (i) and (iii)

(D) (ii) and (iv)

Correct Answer: (C)

3. One of the following substances is neither a good conductor of electricity nor an insulator. This substance is

(A) chromium

(B) germanium

(C) gallium

(D) potassium

Correct Answer: (B)

4. “Is malleable and ductile” best describes :

(A) a solution

(B) a metal

(C) a compound

(D) a non-metal

Correct Answer: (B)

5. Which one of the following is not a metalloid?

(A) boron

(B) silicon

(C) gallium

(D) germanium

Correct Answer: (C)

6. The elements which normally exist in the liquid state are:

(A) bromine and iodine

(B) mercury and chlorine

(C) iodine and mercury

(D) bromine and mercury

Correct Answer: (D)

7. The property/properties which enable copper metal to be used for making electric wires is/are:

(A) copper metal is malleable and ductile

(B) copper metal is a good conductor of electricity

(C) copper metal is ductile and has low electrical resistance

(D) copper metal is sonorous and an excellent conductor of electricity

Correct Answer: (C)

8. One the basis of composition of matter, milk is considered to be:

(A) a pure substance

(B) an impure substance

(C) an element

(D) compound

Correct Answer: (B)

9. 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

Correct Answer: (B)

10. Which one of the following is most likely to exhibit Tyndall effect?

(A) sugar and water mixture

(B) potash alum and water mixture

(C) chalk powder and water mixture

(D) potassium permanganate and water mixture

Correct Answer: (C)

11. Which of the following can be called a suspension?

(A) milk

(B) sand & water

(C) salt solution

(D) vinegar

Correct Answer: (B)

12. One of the following represents the solution of solid in a solid. This one is:

(A) boron

(B) brass

(C) beryllium

(D) bread

Correct Answer: (B)

13. Choices for the correct combination from column-I and Column-II are

Column-IColumn-II
1. Oxygena. Colloid
2. Baking sodab. Element
3. Airc. Compound
4. Colouredd. Mixture gemstone

(A) 1-a, 2-b, 3-c, 4-d

(B) 1-a, 2-d, 3-c, 4-b

(C) 1-b, 2-c, 3-d, 4-a

(D) 1-c, 2-b, 3-a, 4-d

Correct Answer: (C)

14. Select the correct statement(s) from the following:

i. A homogeneous mixture must be uniform.

ii. A mixture containing two compounds is always heterogeneous.

iii. A heterogeneous mixture must contain at least three elements.

iv. A pure substance must contain only one type of atom.

(A) only (i)

(B) (ii) and (iii)

(C) (iii) and (i)

(D) All of these

Correct Answer: (A)

15. When a light beam passes through a colloidal solution, it gets:

(A) Reflected

(B) Scattered

(C) Absorbed

(D) None of these

Correct Answer: (B)

16. The size of colloidal solution is in the range of:

(A) 1-100 nm

(B) 10-1000 nm

(C) 10–4 nm –10–7m (D) 103 – 109 m

Correct Answer: (A)

17. Smoke is an example of

(A) Solid dispersed in solid

(B) Gas dispersed in solid

(C) Solid dispersed in gas

(D) Liquid dispersed in solid

Correct Answer: (C)

18. There are four test tubes A, B, C and D half filled with water. A considerable quantity of sugar, milk, egg white and common salt were added in them respectively with stirring the contents of each tube. True solution will be obtained in

(A) Only A

(B) Only D

(C) Both B and C

(D) Both A and D

Correct Answer: (D)

19. Choices for the correct combination from column-I and Column-II are

Column-IColumn-II
1. Sugar solutiona. Suspension
2. Milkb. Aerosol
3. Smokec. True solution
4. Chalk & waterd. Emulsion

(A) 1-d, 2-c, 3-a, 4-b

(B) 1-c, 2-d, 3-a, 4-b

(C) 1-c, 2-d, 3-b, 4-a

(D) 1-b, 2-a, 3-c, 4-d

Correct Answer: (C)

20. Which one of the following is not a chemical change?

(A) formation of curd

(B) ripening of banana

(C) sublimation of naphthalene

(D) corrosion of photo frame

Correct Answer: (C)

21. The rusting of an iron object is called:

(A) corrosion and it is a physical as well as a chemical change

(B) dissolution and it is a physical change

(C) corrosion and it is a chemical change

(D) dissolution and it is a chemical change

Correct Answer: (C)

22. Which of the following are physical changes?

i. melting of iron metal

ii. rusting of iron metal

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)

Correct Answer: (C)

23. Which of the following are chemical changes?

(i) decaying of wood

(ii) burning of wood

(iii) sawing of wood

(iv) hammering of nail into wood

(A) (i) and (ii)

(B) (ii) and (iii)

(C) (iii) and (iv)

(D) (i) and (iv)

Correct Answer: (A)

24. Solutions having low concentrations of solutes are:

(A) Concentrated solutions

(B) Dilute solutions

(C) Super saturated solutions

(D) None of these

Correct Answer: (B)

25. The amount of solute present per unit volume or per unit mass of the solution is known as:

(A) Composition of solution

(B) Saturation of a solvent.

(C) Concentration of a solute.

(D) Concentration of a solution.

Correct Answer: (D)

26. Which of the following is an example involving both physical and chemical change?

(A) Burning of a candle

(B) Rusting of iron

(C) Cooking of food

(D) Dissolving salt in water

Correct Answer: (A)

27. If 2 mL of acetone is present in 45 mL of its aqueous solution, calculate the concentration of this solution

(A) 4.4%

(B) 4.7 %

(C) 3.9 %

(D) 5.1 %

Correct Answer: (A)

28. If the amount of solute contained in the solution is less than the saturation level….. it called as ………….

(A) Saturated solution

(B) Unsaturated solution

(C) Homogenous solution

(D) Heterogeneous solution

Correct Answer: (B)

29. Component present in large amount in solution called ……….

(A) Solute

(B) Sugar

(C) Solvent

(D) Mixture

Correct Answer: (C)

30. What precaution should be taken while separating the coloured components of ink?

(A) Ink should not be heated directly.

(B) Ink should be heated directly on low temperature

(C) Ink should be heated directly on high temperature.

(D) None of the above

Correct Answer: (A)

31. A mixture contains four solid compounds: A, B, C and D and C gets converted to vapour form when it is heated. C may be separated from the rest of the solids using

(A) Crystallisation

(B) Sublimation

(C) Centrifugation

(D) Magnetic Separation

Correct Answer: (B)

32. Select odd one out from the following:

(A) Bromine

(B) Oxygen

(C) Mercury

(D) Iodine

Correct Answer: (C)

33. The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as

(A) evaporation

(B) decanting

(C) chromatography

(D) None of the above

Correct Answer: (A)

34. Which one of the following would you use to separate sand from iron filings?

(A) chromatography paper

(B) a distillation apparatus

(C) filter paper

(D) a bar magnet

Correct Answer: (D)

35. Which one of the following techniques would best be used to separate soil and water?

(A) Filtration

(B) Fractional distillation

(C) Chromatography

(D) Decanting

Correct Answer: (A)

36. A separating funnel is used to separate

(A) miscible liquids

(B) Immiscible liquids

(C) Cream from milk

(D) None of the above

Correct Answer: (B)

37. Match the following

Column-I Column-II
1. Oil from water(a) Filtration
2. Iron pins from(b) Magnetic sand separation
3. Small pieces of(c) Centrifugation Metal in engine of a car
4. Butter from curd(d) Separating funnel

 (A) 1-a, 2-b, 3-c, 4-d

(B) 1-d, 2-b, 3-a, 4-c

(C) 1-c, 2-b, 3-a, 4-d

(D) 1-b, 2-a, 3-c, 4-d

Correct Answer: (B)

38. Which of the following method is used to separate petroleum into its constituents?

(A) Chromatography

(B) Crystallisation

(C) Distillation

(D) Fractional distillation

Correct Answer: (D)

39. Which of the following cannot be separated from air by the process of fractional distillation?

(A) oxygen

(B) argon

(C) hydrogen

(D) nitrogen

Correct Answer: (C)

40. The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is:

(A) nitrogen, oxygen, argon

(B) nitrogen, argon, oxygen

(C) argon, oxygen, nitrogen

(D) oxygen, argon, nitrogen

Correct Answer: (B)

41. You are given a mixture of iodine in alcohol, called tincture of iodine. Which method will you use to recover both iodine as well as alcohol, from this mixture?

(A) evaporation

(B) simple distillation

(C) fractional distillation

(D) crystallisation

Correct Answer: (B)

42. Which technique is used to separate drugs from blood?

(A) Sublimation

(B) Chromatography

(C) Centrifugation

(D) Evaporation

Correct Answer: (B)

43. Which of the following components does not get separated by chromatographic technique?

(A) Salt from sea-water

(B) Pigments from natural colours

(C) Colors in a dye

(D) Drugs from blood

Correct Answer: (A)

44. A mixture of ethanol and water can be separated by

(A) Filtration

(B) Decantation

(C) Fractional distillation

(D) Sublimation

Correct Answer: (C)

45. For paper chromatography to work,

(A) the dyes must have different boiling points.

(B) the dyes must have different solubilities in the solvent.

(C) the starting line on the chromatogram must be drawn using pen.

(D) The starting line must be below the level of the solvent.

Correct Answer: (B)

46. Which of the following is a pure substance?

(A) Ice

(B) Iron

(C) Sulphur

(D) All of these

Correct Answer: (D)

47. Which has the least energetic molecules?

(A) Solids

(B) Liquids

(C) Plasma

(D) Gases

Correct Answer: (C)

48. Which of the following are homogeneous in nature?

i. Ice ii. Wood iii. Soil iv. Air

(A) (i) and (iii)

(B) (ii) and (iv)

(C) (i) and (iv)

(D) (iii) and (iv)

Correct Answer: (C)

49. Which of the following is not an emulsion?

(A) milk

(B) butter

(C) face cream

(D) shaving cream

Correct Answer: (D)

50. Which one of the following is not a chemical change?

(A) formation of curd

(B) ripening of banana

(C) sublimation of naphthalene

(D) corrosion of photo frame

Correct Answer: (C)

51. One of the following liquids will leave behind a residue on heating. This one is:

(A) brine

(B) bromine

(C) mercury

(D) alcohol

Correct Answer: (A)

52. Pure copper sulphate can be obtained from an impure sample by the process of:

(A) evaporation

(B) fractional distillation

(C) centrifugation

(D) crystallisation

Correct Answer: (D)

53. The material which is added to water during purification process at the water works so as to disinfect it is:

(A) potassium permanganate

(B) betadine

(C) chlorine

(D) potash alum

Correct Answer: (C)

54. The insoluble substance which settles to the bottom of its container is known as:

(A) Solvent

(B) Solution

(C) Sediment

(D) Slag

Correct Answer: (C)

55. Which of the following statement among the following statements is incorrect about properties of colloids?

1. A colloid is a homogeneous mixture.

2. The size of particles of a colloid is too small to be individually seen by naked eye.

3. Particles of colloids are big enough to scatter a beam of light passing through it and make its path visible.

(A) 1, 2 and 3

(B) 1 and 3

(C) 1 and 2

(D) Only 1

Correct Answer: (D)

56. In a colloidal solution, the zigzag movement of dispersed phase particle is known as

(A) Brownian motion

(B) Translational motion

(C) Circular motion

(D) Rectilinear motion

Correct Answer: (A)

57. The solute and solvent respectively that are present in ‘tincture of iodine’ are:

(A) Water, iodine

(B) Iodine, bromine

(C) Iodine, alcohol

(D) Tin, iodine

Correct Answer: (C)

Chapter -1 Matter in Our Surroundings
Chapter – 2 Is Matter Around Us Pure?
Chapter -3 Atoms and Molecules
Chapter -4 Structure of the Atom
Chapter -5 The Fundamental Unit of Life
Chapter -6 Tissues
Chapter -7 Motion
Chapter -8 Force and Laws of Motion
Chapter -9 Gravitation
Chapter -10 Work and Energy
Chapter -11 Sound
Chapter -12 Improvement of Food Resources

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