Question

When anions and cations approach each other, the valence shell of anions are pulled towards cation nucleus and thus, shape of anion is deformed. The phenomenon of deformation of anion by a cation is known as polarization and the ability of the cation to polarize the anion is called as polarizing power of cation. Due to polarization, sharing of electrons occurs between two ions to some extent and the bond shows some covalent character.
Considering $BeC{l}_2,MgC{l}_2,CaC{l}_2$ and $BaC{l}_2$, predict which of the following statement is true?

• A. Covalent character increases as the atomic number of the metal atom increases
• B. $BeC{l}_2$ is least ionic out of the given chlorides.
• C. $BeC{l}_2$ has the highest melting point among the given chlorides.
• D. All are highly ionic compound.

Answer 1

Answer: (B)

Correct answer is (b) $BeC{l}_2$ is least ionic out of the given chlorides.