Among the following the least thermally stable is-
A
K2CO3
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B
Na2CO3
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C
BaCO3
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D
Li2CO3
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Solution
The correct option is D
Li2CO3
Among Li+,Na+,K+andBa2+,Li+has the smallest size and hence has the highest polarizing power. As a result, Li2CO3has the least ionic character and hence has the least stability.