Class XI

Solution which has uniform composition throughout is called ___________.(a) homogeneous solution
  1. heterogeneous solution
  2. Colloidal solution
  3. none of these
  4. homogeneous solution
Which of the following is a chemical change?
  1. Melting of ice
  2. Rusting of iron
  3. Boiling of water into steam
  4. Dissolving salt in water
Which of the following is a heterogeneous mixture?(
  1. air
  2. brass
  3. sugar dissolved in water
  4. lime water
How can we separate cream from milk?
  1. Centrifugation
  2. Chromatography
  3. Sublimation
  4. Distillation
Which of the following is NOT true about colloids?
  1. Particles in a colloid can pass through filter paper
  2. A colloid is a homogeneous solution
  3. Colloidal particles exhibit Brownian motion
  4. Colloidal particles exhibit electrophoresis.
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