A) \[2HgO\xrightarrow{heat}2Hg+{{O}_{2}}\]
B) \[CaC{{O}_{3}}\xrightarrow{heat}CaO+C{{O}_{2}}\]
C) \[2{{H}_{2}}O\xrightarrow{Electrolysis}2{{H}_{2}}+{{O}_{2}}\]
D) All the above reactions are decomposition reaction
Correct Answer: D
Solution :
In all these reactions the reactants decompose to form simpler products.
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