Which of the following is incorrect about NaCl structure?
A
Nearest neighbours of Na+ ion is six Cl− ion
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B
Na+ ions make FCC lattice
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C
Cl−Cl− ion packed in cubic close packed arrangement
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D
There are eight next nearest neighbours of Na+ ion
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Solution
The correct option is D There are eight next nearest neighbours of Na+ ion NaCl structure is a lattice structure in which Cl− ion is CCP(FCC) lattice and Na+ ions make BCC [Body centre] lattice. Each Na+ ion is surrounded by 6Cl− ions.