(D) : In $CsCl$ crystal, $Cs^{+}$ is at the body center and $Cl^{-}$ at the corners, both having a coordination number of $8$. This is correct.$B$: In

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(D) : In $CsCl$ crystal, $Cs^{+}$ is at the body center and $Cl^{-}$ at the corners, both having a coordination number of $8$. This is correct.$B$: In $NaCl$ structure, the edge length $a = 2(r_{Na^{+}} + r_{Cl^{-}}) = 2(95 + 181) \ pm = 2(276) \ pm = 552 \ pm$. This is correct.$C$: In any crystal lattice, ions at the faces, edges, or corners are shared between adjacent unit cells. This is correct.Therefore, all statements are correct.

Class 12 Chemistry Solid State Mix Examples-Solid state

Medium

Which of the following statement(s) is (are) correct?

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A
The coordination number of each type of ion in $CsCl$ crystal is $8$.
B
The length of the unit cell in $NaCl$ is $552 \ pm$ $(r_{Na^{+}} = 95 \ pm; r_{Cl^{-}} = 181 \ pm)$.
C
$A$ unit cell of an ionic crystal shares some of its ions with other unit cells.
D
All of the above