Which of the following has the lowest thermal | vedclass

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(A) The thermal stability of alkali metal carbonates increases as we move down the group from $Li$ to $Cs$. This is because the electropositive charac

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$Li_2CO_3$

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(A) The thermal stability of alkali metal carbonates increases as we move down the group from $Li$ to $Cs$. This is because the electropositive character of the alkali metal increases down the group,which makes the metal-oxygen bond stronger and the carbonate ion more stable. $Li^+$ has a very small size and high polarizing power,which causes it to polarize the carbonate ion $(CO_3^{2-})$ significantly,leading to its decomposition into $Li_2O$ and $CO_2$ at lower temperatures compared to other alkali metal carbonates. Therefore,$Li_2CO_3$ has the lowest thermal stability.

Which of the following has the lowest thermal stability?

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