Question

Lithium chloride is highly soluble in:
A.${C_6}{H_6}$
B.${H_2}O$
C.${D_2}O$
D.All of these

Answer 1

Lithium chloride is a salt with the molecular formula of $LiCl$. There is not much difference in the electronegativity values of lithium and chloride and is involved in covalent bonds. Due to the absence of polar nature, it is not soluble in polar solvents like water. As like dissolves in like.

Complete answer:
The alkali earth metals and metals and halogens are non-metals. Both these atoms combine and forms salts. Lithium is a chemical element with atomic number $3$ and has the electronegativity value of $0.98$and chlorine is the chemical element with atomic number $17$ and belongs to halogens with the electronegativity of $3.16$. Though there is difference in the electronegativity of both these atoms. Due to the small size of fluorine these atoms are involved in covalent bonding and has covalent nature.
The polar compounds dissolve in polar solvents only. Water and deuterated water are polar solvents.
Benzene is a non-polar solvent.
Due to the absence of ionic bonding, lithium chloride does not dissolve in polar solvents like water or deuterated water and soluble in organic or non-polar solvents like benzene.
Thus, Lithium chloride is highly soluble in benzene.
Thus option A is the correct answer.

Note:
The elements with the electronegativity difference more than $1.7$ are generally involved in ionic bonding. Though there is a high difference in the electronegativity values of lithium and chlorine it does not form ionic bonding as lithium has high polarizing power.