A) \[CaC{{O}_{3}}\xrightarrow{{}}CaO+C{{O}_{2}}\]
B) \[{{O}_{2}}+2{{H}_{2}}\xrightarrow[{}]{{}}2{{H}_{2}}O\]
C) \[Na+{{H}_{2}}O\xrightarrow[{}]{{}}NaOH+\frac{1}{2}{{H}_{2}}\]
D) \[MnC{{l}_{3}}\xrightarrow{{}}MnC{{l}_{2}}+\frac{1}{2}C{{l}_{2}}\]
Correct Answer: A
Solution :
\[\overset{+2+4-2}{\mathop{CaC{{O}_{3}}}}\,\xrightarrow{{}}\overset{+2-2}{\mathop{CaO}}\,+\overset{+4-2}{\mathop{C{{O}_{2}}}}\,\] Since, the reaction does not involve oxidation and reduction, it is not a redox reaction.
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