Question

Among $LiCl,BeC{l}_2,BC{l}_3$ and $CC{l}_4$, the covalent bond character follows the order:

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

Answer 1

The correct option is A $LiCl<BeC{l}_2<BC{l}_3<CC{l}_4$

The electronegativity increases as we go from left to right in a period.

So, the electronegativity difference between elements and chlorine decreases.

Covalent character increases with decrease in value of electronegativity difference between elements. thus the correct order is:

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