9th Class Science Is Matter Around Us Pure Question Bank 9th CBSE Science Is Matter Around Us Pure

  • question_answer
     (i) Distinguish among true solution, suspension and colloid in a tabular form under the following heads. (a) stability (b) filterability (c) type of mixture (ii) What is meant by concentration of a solution? How will you prepare a 10% solution of glucose by mass in water?

    Answer:

                    (1) Distinction between true solution, suspension and colloid
    Property Solution Suspension Colloid
    Stability It is stable. Constituting particles do not settle down on keeping. It is unstable. Constituting particles settle down on keeping undisturbed. It is stable. Constituting particles do not settle down on keeping undisturbed.
    (ii) Concentration of a solution may be defined as the amount of the solute either by mass or by volume in a given amount of the solvent or solution. It is normally expressed either as mass-mass per cent or as mass-volume per cent. 10 per cent solution of glucose can be prepared by dissolving 10g of glucose in 90 g of water.                                                          (2)


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