1.

A solid AB has square planar structure. If the radius of cation A+ is 120pm, calculate the maximum possible value of anion B- (a) 240 pm (b) 270 pm (c) 280 pm (d) 290 pm

Answer»

Answer is (d) 290 pm

Square planar means ratio ratio is between 0.414 – 0.732 

If radius of cation is 120 pm then anion should be in the range ρ = rcation/ranion 

0.414 = 120/ x so x = 289.8 = 290 pm 

0.732 = 120/ x so x = 163.9 = 164 pm



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