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Saturday, 23 May 2015

Why air is a mixture not a compound? Give reasons

Why air is a mixture not a compound? Give reasons. 

Air is a mixture for of the following reasons: 

1. Air does not have a fixed composition. Its composition varies from place to place. 

2. The components of air can be separated by a physical method such as fractional distillation of liquid air. 

3. Liquid air does not have a definite boiling point. 

4. We can prepare air artificially by mixing the various components of air in the same proportions in which they occur at a place. This is a physical process because no energy changes occur.



  1. The properties of the constituents of air (oxygen, nitrogen, carbon dioxide etc.) are not changed. For example, pure oxygen is a supporter of combustion. Oxygen present in air also supports combustion. Pure carbon dioxide turns lime water milky. Carbon dioxide present in air also turns lime water milky.
    SSC CGL General Awareness Preparation

  2. nice,
    with no proper meaning