Which of the following has the lowest thermal | vedclass

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(A) Alkali metal carbonates are generally stable to heat,except for $Li_2CO_3$.As we move down the group,the electropositive character of the alkali m

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$Li_2CO_3$

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(A) Alkali metal carbonates are generally stable to heat,except for $Li_2CO_3$.As we move down the group,the electropositive character of the alkali metals increases,which leads to an increase in the thermal stability of their carbonates.The order of thermal stability is: $Li_2CO_3 $Li_2CO_3$ is the least stable because $Li^+$ has a high polarizing power due to its small size,which weakens the $C-O$ bond in the carbonate ion,leading to decomposition upon heating: $Li_2CO_3 \rightarrow Li_2O + CO_2$.

Which of the following has the lowest thermal stability?

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