Ionic radii (Å) of Sb3+,Bi3+and As3+follow the order
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a
Sb3+>Bi3+>As3+
b
Bi3+>As3+>Sb3+
c
Bi3+>Sb3+>As3+
d
As3+>Sb3+>Bi3+
answer is C.
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Detailed Solution
Ionic radii (A˙) of Sb3+,Bi3+and As3+follow the order :Bi3+>Sb3+>As3+because ionic and atomic radii increases on moving down the group due to addition of extra shells.