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Grade: upto college level
        
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+
4 years ago

Answers : (1)

Deepak Patra
askIITians Faculty
471 Points
							

(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+

4 years ago
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