A solid compound XY has NaCl structure. If the radius of the cation is 100pm, the radius of the anion (Y+) will be :
A
271.5pm
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B
322.5pm
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C
241.5pm
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D
220.5pm
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Solution
The correct option is C241.5pm NaCl has fcc arrangement in which Cl−ions occupy the corners and face centres of a cube while Na+ions are present at the edge centres and body centre.