Maximum covalent character is associated with | vedclass

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Question

(D) According to Fajan's rule,covalent character increases with an increase in the polarising power of the cation and the polarisability of the anion.

Vedclass · Accepted Answer

$AlI_3$

Vedclass · Answer

(D) According to Fajan's rule,covalent character increases with an increase in the polarising power of the cation and the polarisability of the anion.$1$. The polarising power of the cation increases as the charge density increases (higher charge and smaller size). Here,$Al^{3+}$ has the highest charge among $Na^+$,$Mg^{2+}$,and $Al^{3+}$.$2$. The polarisability of the anion increases with its size. Among $Cl^-$ and $I^-$,the iodide ion $(I^-)$ is larger and more polarisable.$3$. Therefore,$AlI_3$ has the cation with the highest charge and the anion with the highest polarisability,resulting in the maximum covalent character.

Maximum covalent character is associated with the compound:

Similar Questions

Which of the following diagrams shows the correct change in the ionic character of the given compounds according to Fajans' rule?

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Assertion: $UF_6$ is more covalent than $UF_4$.
Reason: Fluorine is smaller in size.

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