Select the incorrect statement.

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(C) $1$. $Li_2CO_3$ is sparingly soluble in water due to high lattice energy and small size of $Li^+$. $LiHCO_3$ is unstable in solid form and has not

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$Li_2CO_3$ and $MgCO_3$ both are thermally stable.

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(C) $1$. $Li_2CO_3$ is sparingly soluble in water due to high lattice energy and small size of $Li^+$. $LiHCO_3$ is unstable in solid form and has not been isolated. This statement is correct.$2$. $K_2CO_3$ cannot be prepared by the Solvay process because $KHCO_3$ is too soluble in water to precipitate out,unlike $NaHCO_3$. This statement is correct.$3$. $Li_2CO_3$ and $MgCO_3$ are thermally unstable. They decompose on heating to form their respective oxides and $CO_2$ (e.g.,$Li_2CO_3 \xrightarrow{\Delta} Li_2O + CO_2$). This statement is incorrect.$4$. The mineral trona has the formula $Na_2CO_3 \cdot NaHCO_3 \cdot 2H_2O$. This statement is correct.

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