A) \[C+{{O}_{2}}\to C{{O}_{2}}\]
B) \[CaC{{O}_{3}}\to CaO+C{{O}_{2}}\]
C) \[C{{H}_{4}}+2{{O}_{2}}\to C{{O}_{2}}+2{{H}_{2}}O\]
D) \[CaO+{{H}_{2}}\to Ca{{(OH)}_{2}}\]
Correct Answer: B
Solution :
Heat is required to decompose calcium carbonate. Thus this reaction proceeds with absoiption of heat therefore it is endothermic reaction.
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