NH4Cl crystallizes in a body centred cubic lattice , with a unit cell distance of 387pm. Calculate the radius of the NH+4 ion if the radius of the Cl− ion is 181pm.
A
608.67pm
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B
52.67pm
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C
335.15pm
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D
154.15pm
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Solution
The correct option is D154.15pm In a body centred cubic lattice, oppositely charged ions touch each other along the cross-diagonal of the cube.
So, 2r++2r−=√3a