Among the following the maximum covalent character is shown by the compound

Question

Among the following the maximum covalent character is shown by the compound (A) FeCl2 (B) SnCl2 (C) AlCl3 (D) MgCl2

Tardigrade Admin · Accepted Answer

Covalent character is favoured by Fajans’ rule.
(i) Larger the charge on the ions,
(ii) Smaller the size of cations,
(iii) Larger the size of anions.
(iv) Cation with

18

-electron structure (e.g.,

C u^{+}

), then larger the polarizing power and the covalent character is favoured.
In all the given compounds, anion is same

(C l^{-})

, hence polarizing power is decided by size and charge of cation.

A l^{3 +}

with maximum charge and smallest size has maximum polarizing power hence,

A lC l_{3}

has maximum covalent character.

Q. Among the following the maximum covalent character is shown by the compound

$F e C l_{2}$

$S n C l_{2}$

$A lC l_{3}$

$M g C l_{2}$

Q. Among the following the maximum covalent character is shown by the compound

FeCl2​

SnCl2​

AlCl3​

MgCl2​

$F e C l_{2}$

$S n C l_{2}$

$A lC l_{3}$

$M g C l_{2}$