NEET UG CHEMISTRY MCQ: SOLID STATE

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The correct relationship between edge length (a) and radius of atom (r) for BCC unit cell is

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Correct option: B

a = \frac{{4r}}{{\sqrt 3 }}

Option B (

a = \frac{{4r}}{{\sqrt 3 }}

) is correct because in a BCC unit cell, the atoms touch along the body diagonal, and the body diagonal is equal to

4r

, and also equal to

a\sqrt{3}

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\mathrm{C}{\mathrm{s}^ + }

\mathrm{C}{\mathrm{I}^ - }

\;0.181\,\,nm

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