1.

Each unit cell of NaCl consists of 13Cl6(-) ions and

Answer»

`13Na^(+)`
`14Na^(+)`
`6Na^(+)`
All are wrong

SOLUTION :`13Cl^(-)` IONS means that they are PRESENT at the EDGE centres and body-centre. Hence, `Na^(+)` ions are present at the corners and face-centres . Total `Na^(+)` ions `=8+6=14` .


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