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NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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The charge/size ratio of a cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of the cationic species,

{\mathrm{K}^ + },\mathrm{C}{\mathrm{a}^{2 + }},\mathrm{M}{\mathrm{g}^{2 + }},\mathrm{B}{\mathrm{e}^{2 + }}

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Correct option: C

{\mathrm{K}^ + } < C{\mathrm{a}^{2 + }} < M{\mathrm{g}^{2 + }} < B{\mathrm{e}^{2 + }}

Option C (

{\mathrm{K}^ + } < C{\mathrm{a}^{2 + }} < M{\mathrm{g}^{2 + }} < B{\mathrm{e}^{2 + }}

) is correct because polarizing power increases with increasing charge and decreasing size. Be²⁺ has the highest charge/size ratio and K⁺ has the lowest.

NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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