Among `LiCI,BeCI_(2)` and `C CI_(4)` the covalent bond character varies as .

Options

A. `LiCl lt BeCl_2 lt BCl_3 lt C Cl_4`
B. `LiCl lt BeCl_2 lt BCl_3 lt C Cl_4`
C. `LiCl lt BeCl_2 lt BCl_3 lt C Cl_4`
D. `LiCl gt BeCl_2 gt BCl_3 gt C Cl_4`

Answer

C

Explanation

The electronegativity increases from left to right in any period, so the electronegativity follows the order
Li lt Be lt B lt C
and hence, the covalent character of chlorides of these elements increase from Li to C because size of cation left to right decreases and according to Fajans' rule covalent character increases.