Olympiad – Class IX – Science - Che - Is Matter Around us Pure

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Question - 1

What kind of solution is milk?

  • A Suspension
  • B Colloid
  • C True solution
  • D Alloy

Question - 2

A liquid and a solid are found together in a single phase. What is this known as?

  • A Solution
  • B Solute
  • C Solvent
  • D Emulsion

Question - 3

Which of the following is a homogeneous solution?

  • A Muddy water
  • B Bread
  • C Concrete
  • D A solution of sugar in water

Question - 4

What kind of a colloidal solution is an emulsion?

  • A Solid dispersed in solid.
  • B Liquid dispersed in liquid.
  • C Gas dispersed in liquid.
  • D Liquid dispersed in solid.

Question - 5

In which of the following does scattering of light takes place?

  • A Electrolytic solutions
  • B Colloidal solutions
  • C Electrodialysis
  • D Alcoholic solutions

Question - 6

Which of the following forms a colloidal solution in water?

  • A Salt
  • B Glucose
  • C Starch
  • D Barium nitrate

Question - 7

Which of the following is NOT a physical change?

  • A Tearing a paper
  • B Bending an iron rod
  • C Freezing water into ice
  • D Curdling of milk

Question - 8

In which of the following is Tyndall effect observed?

  • A Solution
  • B Precipitate
  • C Sol
  • D Vapour

Question - 9

How is Brownian motion caused?

  • A Through temperature fluctuations within the liquid phase
  • B Through attraction and repulsion between the charges on the colloidal particles
  • C Through collision of molecules between the colloidal particles
  • D Through pressure variations within the liquid phase

Question - 10

To which of the following category does ice-cream belong?

  • A Solution
  • B Emulsion
  • C Element
  • D Suspension