CBSE Worksheet for chapter-2 Is Matter Around Us Pure class 9

Worksheet For class 9

Find CBSE Worksheet for chapter-2 Is Matter Around Us Pure class 9



Chemistry Worksheet - 2

TOPIC: Is Matter Around Us Pure

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Is Matter is around us


  • Classification of matter based on chemical composition (properties).
  • Elements, metals, non-metals, metalloids.
  • Mixtures – homogeneous and heterogeneous.
  • Compounds and its properties.
  • Difference between –
  1. Elements and compounds.
  2. Mixtures and compounds.
  • Solutions – true solution, colloidal and suspension.
  • Concentration of solution – (weight-weight, weight-volume).
  • Saturated and unsaturated solutions, solubility.
  • Physical and chemical changes.

Separation of mixtures –

  1. Solid-solid (by suitable solvent, sublimation, magnet).
  2. Solid-liquid (by filtration, configuration, evaporation, crystallization, chromatography, distillation).
  3. Liquid-liquid (by fractional distillation, separating funnel).
  4. City water supply.


  1. Which of the following is an example of homogeneous mixture ?
    1. Brass
    2. Muddy water
    3. Soil
    4. All
  2.  Soda is an example of :
    1. gas in a liquid mixture
    2. liquid in a gas mixture
    3. solid in a solid mixture
    4. solid in a gas mixture
  3. The smell of perfume spreads out by a process known as –
    1. evaporation
    2. diffusion
    3. condensation
    4. fusion
  4. Which of the following processes is used to obtain pure water from a common salt solution ?
    1. Filtration
    2. Distillation
    3. Fractional distillation
    4. None of these
  5. We can get a pure liquid from a solution by –
    1. distillation
    2. crystallization
    3. evaporation
    4. sedimentation
  6. Which of the following is a compound ?
    1. air
    2. milk
    3. iodine
    4. water
  7. The concentration of the solution is the mass of the solute in grams , which is present in –
    1. 10gm of solvent
    2. 10gm of solution
    3. 100gm of solvent
    4. 100gm of solution
  8. Which of the following will show Tyndall effect ?
    1. Starch solution
    2. Sodium chloride solution
    3. Copper sulphate solution
    4. Sugar solution
  9. Which of the following statement is not true about suspension ?
    1. The particles of suspension can be separated from solvent by the process of filtration.
    2. When the suspension is kept undisturbed the particles of suspension settle down.
    3. A suspension is homogeneous in nature.
    4. Scattering of light takes place in suspension.
  10. Which of the following method is used for separation of different components of petroleum ?
    1. Fractional distillation
    2. Sublimation
    3. Chromatography
    4. Simple distillation


  1. How much water should be added to 15 grams of salt to obtain 15 percent salt solution ?
  2. Explain why, water is a compound and not a mixture ?
  3. Write the difference between colloid, suspension and true solution ?
  4. How will you separate iron filings, ammonium chloride and sand from their mixture ?
  5. Give the example of each of the following :
    Emulsion, Gel, Aerosol and Foam.
  6. Write applications of centrifugation.

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