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Q.

Match the following closest packing of identical spheres listed in Column-I with the characteristics listed in Column-II.

 Column-I Column-II
A)AAAA packingp)CCP, CN = 12
B)ABAB packingq)HCP, CN = 12
C)ABCABC packingr)BCC, CN = 8
D)Square close packings)Primitive cubic, CN = 6
 (A)(B)(C)(D)
1)pqrs
2)sqps
3)srqp
4)qprs

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a

2

b

1

c

3

d

4

answer is C.

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Detailed Solution

-AA- is simple cube (C.N = 6) 

AB-AB is BCC (C.N = 8), 

ABCABC-HCP(CN=12) & Square close packing in FCC (C.N =12)

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