A) \[R{{b}_{2}}C{{O}_{3}}\]
B) \[{{K}_{2}}C{{O}_{3}}\]
C) \[N{{a}_{2}}C{{O}_{3}}\]
D) \[MgC{{O}_{3}}\]
Correct Answer: D
Solution :
Key Idea: Alkali metals carbonates do not decompose on heating but alkaline earth metal carbonates decompose easily. \[\text{MgC}{{\text{O}}_{3}}\xrightarrow{\Delta }MgO+C{{O}_{2}}\] \[\therefore \] \[\text{MgC}{{\text{O}}_{\text{3}}}\]will decompose most easily among given choices.
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