Q.

 List-I List-II
(A) ccp(1) ABAB
(B) hcp(2) BCC
(C) CsCl(3) ABCABC


The correct match is respectively as A B C is 

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a

A1; B3; C2

b

A3; B1; C2

c

A3; B2; C1

d

A2; B3; C1

answer is B.

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Detailed Solution

 Packing of lattice points in a crystal is of 2-types:-

1.) Cubic close packing (CCP)

2.) hexagonal close packing (HCP)

layers of packing sphere or lattice points in ccp & hcp are 3 .

- CCP is ABCABC type and

- HCP is ABABAB.... type.

Hence the correct answer is (B) 3 1 2

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