The incorrect order of solubility in water is

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(D) $1$. For $Ca(OH)_2, Sr(OH)_2, Ba(OH)_2$: Solubility increases down the group due to the decrease in lattice energy being more significant than the

Vedclass · Accepted Answer

$BaS_2O_3 < MgS_2O_3 < CaS_2O_3$

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(D) $1$. For $Ca(OH)_2, Sr(OH)_2, Ba(OH)_2$: Solubility increases down the group due to the decrease in lattice energy being more significant than the decrease in hydration energy. Thus,$Ca(OH)_2 $2$. For $Li_2CO_3, Na_2CO_3, K_2CO_3$: Solubility of alkali metal carbonates increases down the group. Thus,$Li_2CO_3 $3$. For $CsNO_3, RbNO_3, KNO_3$: Solubility of alkali metal nitrates decreases down the group as the hydration energy decreases more rapidly than the lattice energy. Therefore,the correct order is $CsNO_3 $4$. For $BaS_2O_3, MgS_2O_3, CaS_2O_3$: The solubility of alkaline earth metal thiosulfates generally decreases down the group as the size of the cation increases. The correct order is $CaS_2O_3 > MgS_2O_3 > BaS_2O_3$. Thus,the given order $BaS_2O_3 < MgS_2O_3 < CaS_2O_3$ is incorrect.

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