The correct sequence of increasing covalent character is represented by

Options

A. `BeCl_(2)ltNaClltLiClltLiCl`
B. `NaClltLiClltBeCl_(2)`
C. `BeCl_(2)ltLiCiltNaCl`
D. `LiClltNaClltBeCl_(2)`

Answer

B

Explanation

The cause of covalent character is the polarization of anion by cation which increases (for a given anion ) with the increase of charge density of cation, and the order of increase of charge density is
`Na^(+)ltLi^(+)ltBe^(2+)`