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MHT CET202121 Sep 2021Morning ShiftChemistrySolid StateActual

What is the percentage efficiency of packing in BCC structure?

Options

  1. A32 %
  2. B74 %
  3. C26 %
  4. D68 %

Correct answer

D. 68 %

Step-by-step solution

Packing efficiency: aligned & P.E. = z 4 3 r ^3 V = 2 4 3 ( 3 a 4 )^3 a ^3 = 3 a 8 =0.68 & [ z =2, r = 3 a 4 , V= a ^3 ] aligned In B.C.C., 68 % of total volume is occupied by atoms or ions.

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