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Types of Unit Cell

Which of the ...

Question

Which of the following statement is not true about $N a C l$ structure?

C l^{-}

ions are in fcc arrangement

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N a^{+}

ions has coordination number

4

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C l^{-}

ions has coordination number

6

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Each unit cell contains

4 N a C l

molecules

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Solution

The correct option is C $C l^{-}$ ions are in fcc arrangement
In $N a C l$ crystal $N a^{+}$ ions has coordination number $6$ .

A is correct answer

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Similar questions

Which of the following statements is not true about NaCl structure

[DCE 2001]

N a C l

C l^{-}

F C C

C l^{-}

(r_{N a^{+}} = 95 p m; r_{C l^{-}} = 181 p m)

In which of the following structures coordination number for cations and anions in the packed structure will be same ?

(a) $C l^{-}$ ions form fcc lattice and $N a^{+}$ ions occupy all octahedral voids of the unit cell

(b) $C a^{2 +}$ ions form fcc lattice and $F^{-}$ ions occupy all the eight tetrahedral voids of the unit cell

(d) $S^{2 -}$ ions form fcc lattice and $Z n^{2 +}$ ions go into alternate tetrahedral voids of the unit cell

C s^{+}

C l^{-}

C s C l

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