Question

Lithium Chloride is highly soluble in -

• A. ${\mathrm{C}}_6{\mathrm{H}}_6$
• B. ${\mathrm{H}}_2\mathrm{O}$
• C. ${\mathrm{D}}_2\mathrm{O}$
• D. All of these

Answer 1

The correct option is A

${\mathrm{C}}_6{\mathrm{H}}_6$

Explanation for the correct answer:-

Option (A) ${\mathrm{C}}_6{\mathrm{H}}_6$

• In $\mathrm{LiCl}$ Lithium is an alkali metal(group 1 element).
• Due to the small size of Lithium the bond between Lithium and Chlorine is covalent in nature or we can say that it is non-polar.
• Benzene is a non-polar solvent thus it can dissolve non-polar substances and hence $\mathrm{LiCl}$ is highly soluble in it.
• Hence it is the correct option.

Explanation for the incorrect answer:-

Option (B) ${\mathrm{H}}_2\mathrm{O}$

• Water is a polar substance.
• And we know that only polar substances are soluble in polar solvents.
• But here Lithium chloride is covalent that is non-polar.
• Hence it is not soluble in water.
• Hence it is the correct option.

Option (C) ${\mathrm{D}}_2\mathrm{O}$

• Like water, hard water is also a polar substance.
• And we know that only polar substances are soluble in polar solvents.
• But here Lithium chloride is covalent that is non-polar.
• Hence it is not soluble in hard water.
• Hence it is the correct option.

Option (D) All of these

• Lithium chloride here is highly soluble in Benzene ${\mathrm{C}}_6{\mathrm{H}}_6$ only.
• It is not soluble in water ${\mathrm{H}}_2\mathrm{O}$ or hard water ${\mathrm{D}}_2\mathrm{O}$.
• Hence it is the incorrect option.

Therefore, LiCl is soluble in option (A) ${\mathrm{C}}_6{\mathrm{H}}_6$.