A) \[MgC{{O}_{3}}\]
B) \[N{{a}_{2}}C{{O}_{3}}\]
C) \[{{K}_{2}}C{{O}_{3}}\]
D) \[R{{b}_{2}}C{{O}_{3}}\]
Correct Answer: A
Solution :
\[MgC{{O}_{3}}\]decomposes on heating to give \[MgO\] and \[C{{O}_{2}}\] while alkali metal carbonates (except \[L{{i}_{2}}C{{O}_{3}}\]) do not.
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