Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-diagram based-Easy-Class 11
Consider a diagram showing the decomposition of calcium carbonate (CaCO3) into calcium oxide (CaO) and carbon dioxide (CO2) upon heating. Label the process as exothermic or endothermic and identify the correct enthalpy change from the options below.
A
Endothermic; ∆rH = +178.3 kJ mol–1
B
Exothermic; ∆rH = -178.3 kJ mol–1
C
Endothermic; ∆rH = -178.3 kJ mol–1
D
Exothermic; ∆rH = +178.3 kJ mol–1
Correct Answer
Option A
Detailed Explanation
The decomposition of CaCO3 is an endothermic process, requiring heat input, with an enthalpy change of +178.3 kJ mol–1.
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