If the positions of ` Na^(+) and Cl^(-)` are interchanged in NaCl, having fcc arrangement of ` Cl^(-)` ions then in the unit cell of NaCl

Options

A. `Na^+` ions will decrease by 1 while `Cl^-` ions will increase by 1
B. `Na^+` ions will increase by 1 while `Cl^-` ions will decrease by 1
C. Number of `Na^+` and `Cl^-` ions will remain the same
D. The crystal structure of NaCl wil change

Answer

B

Explanation

In NaCl with fcc arrangement of `Cl^-` ions , number of `Cl^-` ion =14 , `Na^+` ions =13. On interchanging their positions, `Cl^-` ions will be 13 and `Na^+` ions will be 14