Which of the following statements is/are correct?

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The co-ordination number of each type of ion in CsCl crystal is8

A metal that crystallizes in b. c. c. structure has a co-ordination number of 12

A unit cell of an ionic crystal shares some of its ions with other unit cells

The length of the unit cell in NaCl is 552 pm rNa+=95pm,rCl−=181pm

answer is A.

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Detailed Solution

edge length (a) = 2(radius of cation+radius of anion)

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