A) \[{{K}_{2}}C{{O}_{3}}\]
B) \[~N{{a}_{2}}C{{O}_{3}}\]
C) \[~BaC{{O}_{3}}\]
D) \[~L{{i}_{2}}C{{O}_{3}}\]
Correct Answer: D
Solution :
Thermal stability of carbonates increases on moving down a group. Thus, lithium carbonate, \[\text{L}{{\text{i}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\]is least thermally stable. \[L{{i}_{2}}C{{O}_{3}}\xrightarrow{\Delta }L{{i}_{2}}O+C{{O}_{2}}\uparrow \]
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