NEET Chemistry The Solid State Questions Solved

Iron crystallizes in a b.c.c. system with a lattice parameter of 2.861 A0. Calculate the density of iron in the b.c.c. system (Atomic weight of Fe = 56, NA=6.02×1023mol-1)

(A) 7.92g ml-1                                   

 (B) 8.96g ml-1

(C) 2.78g ml-1                                     

(D) 6.72g ml-1

(A). For b.c.c., Z = 2, Now, d=ZMNV and V=a3

 d=2×566.02×1023×2.861×10-83=7.92g ml-1

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