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Q.

Consider the radii 0.095 nm Na+,0.181 nm (CI-), 0.074 nm (Zn2+)0.184 nm S2,0.068 nm Ti4+0.140 nm O2,0.169nm(Cs+)Choose the correct option from among the following. (Use radius ratio rules) 

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a

Zn2+ions are packed in tetrahedral holes 

b

Na+ ions are packed in octahedral holes between the planes of close-packed CI- ions

c

Cs+ions are packed in a simple cubic array of CI- ions

d

All of these 

answer is D.

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Detailed Solution

Calculate the r+rratio to get the limiting ratio value and according to the table. All are correct. 

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