Q.

Statement 1: A crystal having fcc structure is more closely packed than a crystal having bcc  structure.

Statement 2: Packing fraction for fcc structure is double than that of bcc structure.

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a

Both Statement 1 and Statement 2 are true. 

b

Both Statement 1 and Statement 2 are false.

c

 Statement 1 is true but Statement 2 is false.

d

Statement 1 is false but Statement 2 is true.

answer is C.

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Detailed Solution

Packing fraction in F.C.C= 74%

Packing fraction in B.C.C = 67.9% 

Packing fraction of F.C.C. is more than B.C.C but not double.

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Statement 1: A crystal having fcc structure is more closely packed than a crystal having bcc  structure.Statement 2: Packing fraction for fcc structure is double than that of bcc structure.