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Pure Substances and Mixtures; Separation of Mixtures — CHEMISTRY STD 6 — Question

ICSE BoardEnglish MediumSTD 6CHEMISTRYPure Substances and Mixtures; Separation of Mixtures5 Marks
Question
State four differences between compounds and mixtures.
✓

Answer

Compound:
  1. A compound is a pure substance.
  2. Compounds are always homogeneous.
  3. A compound has a fixed composition, i.e., it is formed when two or more pure substances chemically combine in a definite ratio by mass.
  4. Formation of a compound involves a change in energy.
  5. Compounds have a specific set of properties.
  6. Components of compounds can be separated only by complex chemical processes.

Mixture:
  1. A mixture is an impure substance.
  2. Mixtures may be homogeneous or heterogeneous.
  3. A mixture has no fixed composition, i.e., it is formed by mixing two or more substances in any ratio without any chemical reaction.
  4. Formation of a mixture does not involve any change in energy.
  5. Mixtures do not have any specific set of properties.
  6. Components of mixtures can be separated by simple physical methods.

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