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ADNAN MUHAMMED

Grade 12,

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The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, K + , Ca 2+ , Mg 2+ , Be 2+ ? a. Ca 2+ 2+ 2+ + b. Mg 2+ 2+ + 2+ c. Be 2+ + 2+ 2+ d. K + 2+ 2+ 2+

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

Grade:upto college level

1 Answers

Deepak Patra
askIITians Faculty 471 Points
9 years ago

(d) Smaller the size and higher the charge more will be polarizing power of cation. Since the order of the size of cation is K+ > Ca++ > Mg++ > Be++. So the correct order of polarizing power is

K+ < Ca2+ < Mg2+ < Be2+

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