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Question

Which of the following processes is not responsible for liberation of carbon dioxide?


  1. Respiration

  2. Photosynthesis

  3. Burning of fuels

  4. None of these


Solution

The correct option is B

Photosynthesis


Photosynthesis does not produce carbon dioxide. It takes up carbon dioxide and water and releases oxygen.
Respiration is the process involving realease of carbon dioxide and intake of oxygen. 
Burning of fuels involves the release of carbon present in almost all fuels. This carbon mix with the oxygen involved in the combustion of fuel thus being carbon dioxide and releases to the atmosphere.
Volcanic eruption liberates significant amount of carbon dioxide and several other green house gases due to the burning of several organic matter made of carbon.

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