Q.

Which of the following processes produces carbon dioxide?


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a

Photosynthesis

b

Burning

c

Breathing

d

Both 2 and 3 

answer is D.

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Detailed Solution

Burning and breathing are the processes that produce carbon dioxide.
While respiration is a chemical process by which the body breaks down carbohydrates to produce energy, breathing is a physical function that involves taking in oxygen and exhaling carbon dioxide. Carbon dioxide is another product of burning. Carbon dioxide is consumed during photosynthesis and not released.
 
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Which of the following processes produces carbon dioxide?