Choose the incorrect order of the given prope | vedclass

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(D) $1$. $BeCl_2$ is covalent,while $LiCl$ is ionic. Ionic compounds have higher electrical conductivity in molten state than covalent compounds. So,$

Vedclass · Accepted Answer

$LiF > LiCl > LiBr > LiI$ (Solubility order in water)

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(D) $1$. $BeCl_2$ is covalent,while $LiCl$ is ionic. Ionic compounds have higher electrical conductivity in molten state than covalent compounds. So,$BeCl_2 $2$. Thermal stability of ionic compounds increases with the increase in the size of the cation (for the same anion). $NaF $3$. For sulfates of alkaline earth metals,thermal stability increases down the group as the size of the cation increases. Thus,the order should be $BeSO_4 $4$. Solubility of alkali metal halides in water depends on the balance between lattice energy and hydration energy. For $Li$ salts,the lattice energy decreases significantly from $LiF$ to $LiI$,but the hydration energy also decreases. However,$LiF$ is known to be the least soluble among $Li$ halides due to its very high lattice energy. Therefore,the order $LiF > LiCl > LiBr > LiI$ is incorrect; the correct order is $LiI > LiBr > LiCl > LiF$.

Choose the incorrect order of the given properties.

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