Allied solutions

Allied solutions

Grade 8

Elements, Compounds and Mixtures | Exercise

Question 11

Q11) State any one method to - separate the following mixtures -

  1. Two solid mixtures one of which - directly changes into vapour on heating.
  2. Two solid mixtures one of which - dissolves in a - particular solvent and other does not.
  3. A solid-liquid mixture containing - an insoluble solid in the liquid component
  4. A solid-liquid mixture containing - a soluble solid in the liquid component
  5. A liquid-liquid mixture containing - two immiscible liquids having different densities.
  6. A liquid-liquid mixture containing - two miscible liquids having different boiling points.
  7. A liquid-gas mixture containing - a gas dissolved in a liquid component
  8. A gas-gas mixture containing - two gases with different densities.
  9. A mixture of different solid constituents - in a liquid constituent.

Solution:

  1. Sublimation - Sublimable solid changes into vapour on heating and the non-sublimable solid is left behind, and they are separated.
  2. Solvent extraction - The soluble solid dissolves in the solvent and the insoluble solid is left behind, and they are separated.
  3. Filtration - insoluble solid is left behind in the filter.
  4. Evaporation - The soluble solid is left behind while the liquid evaporates.
  5. Separating funnel - Heavier liquid collects at the bottom layer, while the lighter liquid layers on the top in the funnel.
  6. Fractional distillation - The liquid with a high boiling point remains in a distillation flask while the other one collects in the receiver.
  7. Boiling - The gas escapes when the mixture is boiled, as the solubility of gas decreases with increase in temperature.
  8. Diffusion - Lighter gas diffuses faster than heavier gas, the porous partition separates them.
  9. Chromatography

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subject-cta

Question 11

Q11) State any one method to - separate the following mixtures -

  1. Two solid mixtures one of which - directly changes into vapour on heating.
  2. Two solid mixtures one of which - dissolves in a - particular solvent and other does not.
  3. A solid-liquid mixture containing - an insoluble solid in the liquid component
  4. A solid-liquid mixture containing - a soluble solid in the liquid component
  5. A liquid-liquid mixture containing - two immiscible liquids having different densities.
  6. A liquid-liquid mixture containing - two miscible liquids having different boiling points.
  7. A liquid-gas mixture containing - a gas dissolved in a liquid component
  8. A gas-gas mixture containing - two gases with different densities.
  9. A mixture of different solid constituents - in a liquid constituent.

Solution:

  1. Sublimation - Sublimable solid changes into vapour on heating and the non-sublimable solid is left behind, and they are separated.
  2. Solvent extraction - The soluble solid dissolves in the solvent and the insoluble solid is left behind, and they are separated.
  3. Filtration - insoluble solid is left behind in the filter.
  4. Evaporation - The soluble solid is left behind while the liquid evaporates.
  5. Separating funnel - Heavier liquid collects at the bottom layer, while the lighter liquid layers on the top in the funnel.
  6. Fractional distillation - The liquid with a high boiling point remains in a distillation flask while the other one collects in the receiver.
  7. Boiling - The gas escapes when the mixture is boiled, as the solubility of gas decreases with increase in temperature.
  8. Diffusion - Lighter gas diffuses faster than heavier gas, the porous partition separates them.
  9. Chromatography

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subject-cta
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