Question

Which of the following is in order of increasing covalent character ?

• A. $CC{l}_4<BeC{l}_2<BC{l}_3<LiCl$
• B. $LiCl<CC{l}_4<BeC{l}_2<BC{l}_3$
• C. $LiCl<BeC{l}_2<BC{l}_3<CC{l}_4$
• D. $LiCl<BeC{l}_2<CC{l}_4<BC{l}_3$

Answer 1

Answer: (C)

$LiCl<BeC{l}_2<BC{l}_3<CC{l}_4$

Here, we have a common anion ${Cl}^{-}$.

Along the period from left to right, the metallic character decreases and hence the tendency to form ionic bond decreases due to increase in ionization enthalpy.

Therefore, the tendency to form covalent bond increases along the period.

Oder of increasing covalent character:$LiCl<Be{Cl}_2<B{Cl}_3<C{Cl}_4$