Question

What is the correct decreasing order of covalent nature?

Answer 1

Answer:

3. NaCl < LiCl < BeCl2

Explanation:

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 ΔEN be the two atoms.

If ΔEN is small, the bond will have a large amount of covalent character.

If ΔEN is large, the bond will have a small amount of covalent character.

Answer 2

Answer:NaCl< LiCl< BeCl2

Explanation:

We know, acc to fajan’s rule-

- smaller cations are more polarising

- larger anions are more polarisable.

Here, anion is common for all three...hence cation is the determining factor

Smaller cation posses more polarising power...hence impart covalent character to ionic compounds..

Size of cations follows the order..

Be2+< Li+ <Na+

Hence the order of covalent character will be.. BeCl2> LiCl> NaCl..

Hope it helps ya:)