Q.

The NaCl lattice has the cubic unit cell as shown.The correct statements are.

Moderate

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By Expert Faculty of Sri Chaitanya

a

rcation+ranion= a/2

b

Cl-- at faces and edges

c

Na+ at corners and body center

d

radius of cation to anion is   2-1

answer is 1,4.

(Detailed Solution Below)

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Detailed Solution

Since, side r++r−and diagonal = 2r−=2r++r−∴            2r−=2r++r−                2=r++r−r−=r+r−+1∴           r+r−=2−1=0.414
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