The correct increasing order of polarising po | vedclass

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Question

(A) According to $Fajan's \ rule$,the polarising power of a cation is directly proportional to its charge density (charge/size ratio).For the given io

Vedclass · Accepted Answer

$K^{+} < Ca^{2+} < Mg^{2+} < Be^{2+}$

Vedclass · Answer

(A) According to $Fajan's \ rule$,the polarising power of a cation is directly proportional to its charge density (charge/size ratio).For the given ions $K^{+}$,$Ca^{2+}$,$Mg^{2+}$,and $Be^{2+}$,the charge increases from $+1$ to $+2$ and the ionic size decreases in the order $K^{+} > Ca^{2+} > Mg^{2+} > Be^{2+}$.Since polarising power increases as the charge increases and the size decreases,the correct increasing order is $K^{+} < Ca^{2+} < Mg^{2+} < Be^{2+}$.

The correct increasing order of polarising power is

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