JEE Main 2021 — Solid State Question with Solution
From: JEE Main 2021 (Online) 16th March Evening Shift
Question
Ga (atomic mass 70 u) crystallizes in a hexagonal close packed structure. The total number of voids in 0.581 g of Ga is __________ 1021. (Round off to the Nearest Integer). [Given : NA = 6.023 1023]
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Show full solutionCorrect answer: 14.99
Correct answer
14.99
Step-by-step explanation
For HCP structure Z = 6
Tetrahedral Void = (Z 2) = 12
Octahedral Void = [Z 1] = 6
No. of void per unit cell = 18
No. of unit cell =
No. of void =
Tetrahedral Void = (Z 2) = 12
Octahedral Void = [Z 1] = 6
No. of void per unit cell = 18
No. of unit cell =
No. of void =
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