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1= both the given reactions are exothermic reactions as both of them release energy
2=Oxidation of food in the body releases energy. Oxidation is an exothermic reaction. The amount of energy released by a known mass of food during combustion (an oxidation reaction) can be measured in the laboratory. The heat released by the combustion of food is used to heat a known mass of water. hence it is a combustion reaction as it takes place in presence of oxygen and releases energy
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