General Science Chemistry MCQs

Q.  Which of the following is an endothermic reaction?

a. Decomposition of calcium carbonate to calcium oxide and carbon dioxide
b. Respiration
c. Burning of Natural gas
d. All of the above


ANSWER: See Answer
 
Decomposition of calcium carbonate to calcium oxide and carbon dioxide is an endothermic reaction. Respiration and Burning of Natural gas are examples of exothermic reactions.
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