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JEE CHEMISTRY MCQ: SOLID STATE

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Analyzing +4 | -1
Consider a body centred cubic (BCC) arrangement, let de\mathrm{d}_{\mathrm{e}}, dfd,dbd\mathrm{d}_{\mathrm{fd}}, \mathrm{d}_{\mathrm{bd}} be the distances between successive atoms located along the edge, the face-diagonal, the body diagonal respectively in a unit cell. Their order is given by -
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Correct option: C
dfd>de>dfd\mathrm{d}_{\mathrm{fd}}>\mathrm{d}_{\mathrm{e}}>\mathrm{d}_{\mathrm{fd}}
Option D (d_bd > d_e > d_fd) is incorrect. The correct order is d_fd > d_e > d_bd because the face diagonal is longer than the edge, which is longer than the body diagonal when considering successive atoms.

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