GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Exothermic reaction
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Endothermic reaction
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Either A or B
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None of the above
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Detailed explanation-1: -An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. An endothermic process absorbs heat and cools the surroundings.”
Detailed explanation-2: -An exothermic reaction is a chemical reaction in which less energy is needed to break bonds in the reactants than is released when new bonds form in the products. During an exothermic reaction, energy is constantly given off, often in the form of heat. All combustion reactions are exothermic reactions.
Detailed explanation-3: -Exothermic reactions are chemical reactions that produce heat. In Section II-B of Chapter 3, we defined the heat flow q as negative when heat flows from the system to the surroundings. Thus, exothermic reactions have a negative H of reaction.
Detailed explanation-4: -Therefore, respiration and burning of a candle are examples of exothermic reaction whereas evaporation of water and melting of ice are examples of endothermic reaction.
Detailed explanation-5: -An endothermic reaction is any chemical reaction that absorbs heat from its environment.