Looking for authentic SEBA Class 9 Science Chapter 2 (Is Matter Around Us Pure) MCQ solutions for the 2026–27 academic year? Access complete multiple-choice questions with correct options, detailed explanations, solution concentration numerical rules, Tyndall effect concepts, and chemistry objective notes to score top marks in your annual exams.
MCQ
1. In science, a “pure substance” means:
(a) No adulteration
(b) Looks clean
(c) Contains only one kind of particle
(d) Free from germs
Answer: (c)
2. Which of the following is a pure substance scientifically?
(a) Milk
(b) Air
(c) Soil
(d) Mercury
Answer: (d)
3. Which one of the following is a mixture?
(a) Gold
(b) Sea water
(c) Diamond
(d) Copper
Answer: (b)
4. The components of a mixture can be separated by:
(a) Chemical methods only
(b) Cannot be separated
(c) Physical methods
(d) Reactions
Answer: (c)
5. A homogeneous mixture is:
(a) Not uniform
(b) Uniform throughout
(c) A compound
(d) An element
Answer: (b)
6. A heterogeneous mixture is:
(a) Looks same everywhere
(b) Has visible different parts
(c) Pure
(d) A chemical combination
Answer: (b)
7. Which is a homogeneous mixture?
(a) Oil and water
(b) Muddy water
(c) Sugar solution
(d) Chalk in water
Answer: (c)
8. Which is a heterogeneous mixture?
(a) Air
(b) Lemonade
(c) Brass
(d) Oil and water
Answer: (d)
9. In a sugar solution, the solvent is:
(a) Sugar
(b) Water
(c) Both
(d) None
Answer: (b)
10. In soda water, the solute is:
(a) Water
(b) CO₂ gas
(c) Air
(d) Salt
Answer: (b)
SEBA Class 9 Science Chapter 2 MCQ Solutions
11. A solution is:
(a) Heterogeneous
(b) Homogeneous mixture
(c) Pure substance
(d) Only gases
Answer: (b)
12. Solutions have particle size:
(a) Large
(b) Medium
(c) Very small (<1 nm)
(d) Visible
Answer: (c)
13. Solutions show Tyndall effect?
(a) Always
(b) Sometimes
(c) Never
(d) Only at night
Answer: (c)
14. Which cannot be separated by filtration?
(a) Chalk in water
(b) Sand in water
(c) Mud in water
(d) Salt solution
Answer: (d)
15. A suspension is:
(a) Homogeneous
(b) Pure
(c) Heterogeneous with large particles
(d) Alloy
Answer: (c)
16. Which mixture has particles that settle down?
(a) Solution
(b) Colloid
(c) Suspension
(d) Air
Answer: (c)
17. Suspensions show Tyndall effect because:
(a) No particles
(b) Large particles scatter light
(c) No solute
(d) No solvent
Answer: (b)
18. A colloid is:
(a) Homogeneous
(b) Compound
(c) Heterogeneous but appears uniform
(d) Pure
Answer: (c)
19. Which is a colloid?
(a) Salt solution
(b) Chalk water
(c) Milk
(d) Air
Answer: (c)
20. Colloids show Tyndall effect because:
(a) No particles
(b) Medium-sized particles scatter light
(c) They dissolve fully
(d) They settle down
Answer: (b)
Class 9 Science Chapter 2 MCQ Question Answer SEBA 2026-27
21. Which mixture is stable (does not settle down)?
(a) Suspension
(b) Colloid
(c) Sand-water
(d) Muddy water
Answer: (b)
22. Which cannot be filtered using filter paper?
(a) Mud water
(b) Sand water
(c) Chalk water
(d) Milk (colloid)
Answer: (d)
23. A saturated solution is one that:
(a) Has less solute
(b) Cannot dissolve more solute at given temperature
(c) Is heated
(d) Has only solvent
Answer: (b)
24. On heating a saturated solution, it becomes:
(a) Concentrated
(b) Solid
(c) Heterogeneous
(d) Unsaturated (can dissolve more solute)
Answer: (d)
25. On cooling a saturated solution:
(a) More solute dissolves
(b) Extra solute crystallizes out
(c) It evaporates
(d) It becomes lighter
Answer: (b)
26. A dilute solution has:
(a) More solute
(b) Only solvent
(c) Less solute
(d) No particles
Answer: (c)
27. Which expresses concentration?
(a) Density
(b) Mass by mass %
(c) Boiling point
(d) Colour
Answer: (b)
28. Which is a physical change?
(a) Burning
(b) Rusting
(c) Digestion
(d) Melting of ice
Answer: (d)
29. Which is a chemical change?
(a) Boiling water
(b) Evaporation
(c) Cooking food
(d) Freezing
Answer: (c)
30. Burning of a candle involves:
(a) Only physical change
(b) Only chemical change
(c) Both physical and chemical
(d) No change
Answer: (c)
Is Matter Around Us Pure Class 9 SEBA MCQ Notes
31. Rusting of iron is:
(a) Physical
(b) Chemical change
(c) Temporary change
(d) Reversible
Answer: (b)
32. Elements cannot be:
(a) Seen
(b) Touched
(c) Broken into simpler substances
(d) Melted
Answer: (c)
33. Copper is:
(a) Non-metal
(b) Metal
(c) Metalloid
(d) Gas
Answer: (b)
34. Bromine is special because it is:
(a) Solid non-metal
(b) Metal
(c) Liquid non-metal
(d) Gas
Answer: (c)
35. Mercury is:
(a) Solid metal
(b) Gas
(c) Liquid metal
(d) Non-metal
Answer: (c)
36. Which is a compound?
(a) Gold
(b) Iron
(c) Water
(d) Diamond
Answer: (c)
37. A compound has:
(a) Variable composition
(b) Fixed composition
(c) No elements
(d) No ratio
Answer: (b)
38. Salt (NaCl) is formed by:
(a) Physical mixing
(b) Chemical combination
(c) Sublimation
(d) Evaporation
Answer: (b)
39. Which separation technique is used for salt from seawater?
(a) Filtration
(b) Evaporation
(c) Magnetic separation
(d) Distillation
Answer: (b)
40. Sublimation separates:
(a) Liquids only
(b) Solids only
(c) Solid → gas substances like ammonium chloride
(d) Metals
Answer: (c)
SEBA Class 9 Science Chapter 2 Multiple Choice Questions
41. Chromatography is used to separate:
(a) Metals
(b) Salt from water
(c) Coloured pigments
(d) Iron filings
Answer: (c)
42. Which method separates oil from water?
(a) Filtration
(b) Evaporation
(c) Sublimation
(d) Separating funnel
Answer: (d)
43. Magnet is used to separate:
(a) Salt and sugar
(b) Sand and water
(c) Iron filings and sulphur
(d) Milk and water
Answer: (c)
44. A colloid consists of:
(a) Only solute
(b) Only solvent
(c) Dispersed phase + dispersing medium
(d) Metal particles
Answer: (c)
45. Fog is an example of:
(a) Solution
(b) Suspension
(c) Colloid
(d) Gas
Answer: (c)
46. Smoke is a colloid of:
(a) Liquid in gas
(b) Solid in gas
(c) Gas in liquid
(d) Gas in solid
Answer: (b)
47. Milk appears homogeneous because:
(a) It is a solution
(b) It is pure
(c) Particles are very small but not dissolved
(d) It is filtered
Answer: (c)
48. Air is a:
(a) Compound
(b) Heterogeneous mixture
(c) Homogeneous mixture of gases
(d) Pure substance
Answer: (c)
49. Bronze is an example of:
(a) Compound
(b) Alloy (solution of metals)
(c) Suspension
(d) Colloid
Answer: (b)
50. Iron + sulphur heated strongly forms:
(a) Mixture
(b) Suspension
(c) Solution
(d) Iron sulphide (compound)
Answer: (d)
Class 9 Science Pure Matter Objective Questions
51. Group A and B mixed copper sulphate in water. What type of mixture did they obtain?
(a) Suspension
(b) Colloid
(c) Solution
(d) Pure substance
Answer: (c)
52. Group A used one spatula of copper sulphate and Group B used two spatulas. What does the difference in colour intensity show?
(a) Solute is different
(b) Water was impure
(c) Mixtures cannot be made
(d) Solutions can have variable composition
Answer: (d)
53. Which of the following is a homogeneous mixture?
(a) Oil and water
(b) Sand and salt
(c) Iron filings and sulphur
(d) Sugar dissolved in water
Answer: (d)
54. Group C and D made mixtures with visible different parts. These are called—
(a) Pure substances
(b) Solutions
(c) Heterogeneous mixtures
(d) Colloids
Answer: (c)
55. When chalk powder is mixed in water (Group C), the mixture formed is a—
(a) Solution
(b) Suspension
(c) Colloid
(d) Pure liquid
Answer: (b)
56. Which mixture shows Tyndall effect strongly?
(a) Salt solution
(b) Milk
(c) Copper sulphate solution
(d) Sugar solution
Answer: (b)
57. In which mixture do particles settle down after some time?
(a) Solution
(b) Colloid
(c) Suspension
(d) All of the above
Answer: (c)
58. Which mixture leaves residue on filter paper?
(a) Salt solution
(b) Milk
(c) Chalk–water mixture
(d) Ink–water mixture
Answer: (c)
59. When no more solute dissolves in water at a given temperature, the solution becomes—
(a) Dilute
(b) Saturated
(c) Colloidal
(d) Heterogeneous
Answer: (b)
60. Heating a saturated solution allows—
(a) Solute to evaporate
(b) Water to freeze
(c) More solute to dissolve
(d) Solute to settle
Answer: (c)
61. What happens when salt is added to hot water after saturation?
(a) It dissolves again
(b) It settles immediately
(c) It reacts
(d) It becomes a colloid
Answer: (a)
62. Group I mixed iron + sulphur without heating. This is a—
(a) Compound
(b) Mixture
(c) Solution
(d) Alloy
Answer: (b)
63. Group II heated iron + sulphur strongly. What was formed?
(a) Mixture
(b) A compound (iron sulphide)
(c) Alloy
(d) Colloid
Answer: (b)
64. Which sample shows magnetic property?
(a) Pure sulphur
(b) Iron sulphide
(c) Mixture of iron and sulphur
(d) Chalk
Answer: (c)
65. Iron sulphide (heated product) reacts with dilute acid to release—
(a) Oxygen gas
(b) Carbon dioxide
(c) Hydrogen sulphide (H₂S)
(d) Nitrogen
Answer: (c)
66. What happens when carbon disulphide is added to the mixture of iron and sulphur?
(a) Both dissolve
(b) Nothing dissolves
(c) Only sulphur dissolves
(d) Only iron dissolves
Answer: (c)
67. In a solution of copper sulphate, the solute is—
(a) Water
(b) Copper sulphate
(c) Air
(d) None
Answer: (b)
68. The beam of light is visible in which type of mixture?
(a) Solution
(b) Colloid
(c) Pure substance
(d) None
Answer: (b)
69. A mixture whose particles cannot be seen even with a microscope and do not settle down is—
(a) Suspension
(b) Solution
(c) Colloid
(d) Pure substance
Answer: (c)
70. When a magnet is brought near iron sulphide, what happens?
(a) This substance is attracted
(b) This substance breaks
(c) No attraction occurs
(d) It melts
Answer: (c)
🔬 Updated MCQ Guide Notice: This page features a full collection of SEBA Class 9 Science Chapter 2 (Is Matter Around Us Pure) Multiple Choice Questions (MCQs) with accurate options and detailed explanations, fully updated for the 2026–27 academic session in accordance with the latest revised Assam Board (SEBA) curriculum.
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