Question

The correct sequence of increasing covalent character is represented by :

• A. $BeC{l}_2$< $NaCl$<$LiCl$
• B. $NaCl$<$LiCl$ <$BeC{l}_2$
• C. $BeC{l}_2$ < $LiCl$<$NaCl$
• D. $LiCl$<$NaC$l<$BeC{l}_2$

Answer 1

The correct option is B $NaCl$<$LiCl$ <$BeC{l}_2$

In a bond between two atoms, $M$ and $X$ the amount of covalent character in the M-X bond will depend on the difference in electronegativity.

The correct sequence of increasing covalent character is represented by $NaCl$<$LiCl$ <$BeC{l}_2$.

The covalent character is favoured by small cation with high charge.

Hence the correct option is $B$