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JEE Advanced2013ChemistrySolid StateActual

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

Options

  1. A104 pm
  2. B125 ​pm
  3. C183 ​pm
  4. D57 ​pm

Correct answer

A. 104 pm

Step-by-step solution

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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