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JEE Advanced · Chemistry · 15. Solid State

The arrangement of X- ions around A+ ion in solid AX is given in the figure (not drawn to scale). If the radius of X- is 250 pm, the radius of A+ is

  1. A 104 pm
  2. B 125 ​pm
  3. C 183 ​pm
  4. D 57 ​pm
Verified Solution

Answer & Solution

Correct Answer

(A) 104 pm

Step-by-step Solution

Detailed explanation

A+ cation is filled in octahedral hole generated by X- anion 
i.e.,  r A + r X - = 0.414
r A + = 0.414 × 2 5 0 = 103.5  pm
                                      1 0 4 pm
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