Statement I: Distance between nearest lattice points in BCC is greater than the same in FCC having t — Solid State Chemistry Question
Question
Statement I: Distance between nearest lattice points in BCC is greater than the same in FCC having the same edge length. Statement II: FCC has greater packing efficiency than BCC.
Answer: A
💡 Solution & Explanation
Statement I is correct: in BCC, nearest lattice points are corners separated by distance a. In FCC, nearest lattice points are corner to face-center, separated by distance a/sqrt(2) \u2248 0.707a, and a > 0.707a. Statement II is also correct because FCC has 74% and BCC has 68% packing efficiency. Since particles are packed more closely in FCC, the distance between lattice points is smaller, making II a correct explanation of I.
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