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

  • question_answer
      Distinguish between compounds and mixtures.

    Answer:

       
                   Compound                 Mixtures
    1. Compound are formed as result of chemical reactions between two or more element or compounds. 1. Mixtures are formed by simply mixing two or more constituents There are no chemical reactions between the constituents.
    2. The components of a compound are always present in a definite ratio by mass. 2. The components of a mixture may be present in any ratio.
    3. The properties of a compound are entirely different from its constituents. 3. The properties of a mixture are same as those of its constituents.
    4.Compounds are always homogeneous in nature 4. Mixtures are usually heterogeneous (except in solutions).
    5. Compound formation is accompanies by absorption or evolution of light, heat or electrical energy. 5.Heat light or electrical energy may not be evolved or absorbed during the formation of a mixture
    6. Melting and boiling points of a compound are usually sharp and fixed. 6.melting and boiling points of a mixture are usually not sharp and fixed 


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