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QJEEM07Ch37ab: JEE Main 2007 Chemistry - Class 11 JEEM07Ch37ab Solution: The charge/size ratio of a cation determines its polarizing…

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizinig order of the polarizing power of the cationic species, K+, Ca2+, Mg2+, Be2+?

Multiple Choice Options

  • A Mg2+ < Be2+ < K+ < Ca2+
  • B K+ < Ca2+ < Mg2+ < Be2+
  • C Be2+ < K+ < Ca2+ < Mg2+
  • D Ca2+ < Mg2+ < Be2+ < K+

Step-by-Step Verified Solution

As charge/size ratio of a cation determines its polarizing power so high charge and small size of the cations increases polarisation.

As the size of the given cations decreases as

K+ > Ca2+ > Mg2+ > Be2+

Hence, polarising power decreases as

K+ < Ca2+ < Mg2+ < Be2+

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