Is Matter Around Us Pure Test

Is Matter Around Us Pure

This is Is Matter Around Us Pure Test-03 for CBSE class 09 Science.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Name the emulsifier which stabilizes milk emulsion.
  • A
    Cream
  • B
    Water
  • C
    Casein
    Correct
  • D
    Butter
2
The particle size of a substance ‘P’ present in water is 200 nm. What will be the nature of the solution expected?
  • A
    Suspension
    Correct
  • B
    True solution
  • C
    Colloidal solution
  • D
    Emulsion
3
An emulsion is a colloidal solution formed by mixing
  • A
    Two immiscible liquids
    Correct
  • B
    Any two gases
  • C
    Two miscible liquids
  • D
    Any two liquids
4
When a beam of light is passed through a colloidal solution, it gets.
  • A
    Retracted
  • B
    Absorbed
  • C
    Reflected
  • D
    Scattered
    Correct
5
What is the name given to the liquid which contains in it some suspended particles?
  • A
    True solution
  • B
    Suspension (Ans)
    Correct
  • C
    All of these
  • D
    Collided solution
6
Size of particles in a collided solution ranges from
  • A
    \({\text{1}}{0^{ - {\text{5}}}}\)cm to \({\text{1}}{0^{ - {\text{3}}}}\)cm
  • B
    \({\text{1}}{0^{ - {\text{2}}}}\)cm to \({\text{1}}{0^{ - {\text{4}}}}\)cm
  • C
    None of these
  • D
    \({\text{1}}{0^{ - {\text{5}}}}\)cm to \({\text{1}}{0^{ - {\text{7}}}}{\text{cm }}\)
    Correct
7
An example of colloid is
  • A
    Salt solution
  • B
    None of the above
  • C
    Air
  • D
    Milk
    Correct
8
Match the following with correct response. (1) Brass (2) Ammonia in water (3) Vinegar (4) Amalgam (A) Gas in liquid (B) Liquid in solid (C) Liquid in liquid (D) Solid in solid
  • A
    1-D, 2-A, 3-C, 4-B
    Correct
  • B
    1-B, 2-D, 3-A, 4-C
  • C
    1-C, 2-B, 3-D, 4-A
  • D
    1-A, 2-C, 3-B, 4-D
9
Match the following with correct response. (1) Colloidal solution (2) Suspension (3) Saturated solution (4) Solution (A) Maximum amount of solute in a given solvent (B) particle size between 1nm-100mn (C) Particle size is less than 1nm (D) Particles of one substance dispersed not dissolved
  • A
    1-A, 2-C, 3-B, 4-D
  • B
    1-B, 2-D, 3-A, 4-C
    Correct
  • C
    1-C, 2-B, 3-D, 4-A
  • D
    1-D, 2-A, 3-C, 4-B
10
Match the following with correct response. (1) A cloud of smoke in air (2) Oil drops in water (3) Whipped cream (4) Paints (A) Sol (B) Emulsions (C) Aerosols (D) Foam
  • A
    1-D, 2-A, 3-C, 4-B
  • B
    1-A, 2-C, 3-B, 4-D
  • C
    1-B, 2-D, 3-A, 4-C
  • D
    1-C, 2-B, 3-D, 4-A
    Correct
11
Which of the following show Tyndall effect? A Milk b White part of egg c Tincture iodine d Salt solution
  • A
    (b) and (c) are correct
  • B
    (a) and (b) are correct
  • C
    All of these
    Correct
  • D
    (a), (b) and (c) are correct
12
In which of the following particle size is equal to or greater than 100nm? A \(CuS{O_4} + {\text{Water}}\) B Mud + Water C Alum + Water D Sand + water
  • A
    (a) and (b) are correct
  • B
    All of these
    Correct
  • C
    (b) and (c) are correct
  • D
    (a), (b) and (c) are correct
13
How will you bring about the following separation Alcohol from water?
  • A
    By fractional distillation
    Correct
  • B
    By Centrifugation
  • C
    By separating funnel.
  • D
    By sublimation
14
Name the technique to separate butter from curd
  • A
    Fractional distillation
  • B
    Chromatography
  • C
    Distillation
  • D
    Centrifugation
    Correct
15
Statement A: Bleeding from a fresh cut can be stopped by applying alum. Statement B: The solubility of NaCl in water increases with rise in temperature while that of Lithium carbonate decreases. The correct statement is/are
  • A
    Neither Statement A nor Statement B.
  • B
    Both the Statement A and B
    Correct
  • C
    Statement A
  • D
    Statement B