The correct sequence of increasing covalent character is represent by

Options

A. `LiCl lt NaCl lt BeCl_2`
B. `BeCl_2 lt NaCl lt LiCl`
C. `NaCl lt LiCl lt BeCl_2`
D. `BeCl_2 lt LiCl lt NaCl`

Answer

C

Explanation

On the basis of Fajans' rule , lower the size of cation, higher will be its polarising power and higher will be covalent character.
`therefore` Polarising power `prop 1/"size of power"`
Covalent character `prop` polarising power
So, the correct order is
NaCl lt LiCl lt `BeCl_2`
(`because` The order of size of cation `Na^(+) gt Li^(+) gt Be^(2+)`)