Answer : The correct option is, (B) Cellular respiration in humans
Explanation :
Combustion reaction : It is defined as the hydrocarbon react with the oxygen then it react to give carbon dioxide and water as a product.
A. Photosynthesis in plants
Photosynthesis : It is a chemical process or a reaction which takes place in the green plants or the living organisms.
During this process, the carbon dioxide reacts with the water in the presence of sunlight to gives glucose and oxygen as a product.
The balanced chemical reaction will be,
[tex]6CO_2+6H_2O\overset{sunlight}\rightarrow C_6H_{12}O_6+6O_2[/tex]
B. Cellular respiration in humans
Cellular respiration : In this process, the hydrocarbon react with the oxygen to give carbon dioxide and water as a product. This reaction is a combustion reaction.
Cellular respiration is directly opposite of photosynthesis.
The balanced chemical reaction will be,
[tex]C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O[/tex]
C. Mixing of vinegar and baking soda
When vinegar is react with baking soda then it gives sodium acetate, carbon dioxide and water as a product. This reaction is an acid-base reaction.
The balanced chemical reaction will be,
[tex]CH_3COOH+NaHCO_3\rightarrow CH_3COONa+H_2O+CO_2[/tex]
D. Release of carbon dioxide on heating limestone
When limestone (calcium carbonate) is heated then it decomposes to give calcium oxide and carbon dioxide as a product. This reaction is a decomposition reaction.
The balanced chemical reaction will be,
[tex]CaCO_3\rightarrow CaO+CO_2[/tex]
Hence, from this we conclude that the example of combustion reaction is, (B) Cellular respiration in humans
