1.

Which of the following statement/statements is/re correct?

Answer»

in the `NACL` structures, each `Na^(+)` ion is surrounded by `6Cl^(-)` ions as nearest neighbours and twelve `Na^(+)` ions as NEXT nearest neighbours.
the co-ordination NUMBER of CATION generally increases as the radius ratio increases
packing efficiencies higher than `0.74` are possible only with cation and anion of different sizes
during a crystal defect electrical neutrality should be maintained.

Solution :abcd FACTS


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