Question

For given anion, the graph for $NaCl$ type structure levels off at low $\left(r^{+}/r^{-}\right)$ values because of?

• A. cation-cation contact along the face diagonal
• B. anion-anion contact along the face diagonal
• C. cation-anion contact along the cell edge
• D. None of these

Answer 1

The correct option is B anion-anion contact along the face diagonal

$\begin{array}{c}NaCl\to \text{fcc type structure}\\ f\text{ace}+\text{corner}-{Cl}^{-}\\ \text{body}+\text{Edge}-{Na}^{+}\end{array}$

$\begin{array}{c}\text{Nacl type structure levels off at low}\\ \frac{{\gamma }^{+}}{{\gamma }^{-}}\text{values off anion-anion}\\ \text{contact along the face digonal}\\ \text{correct Answer}-\underset{–}{B}\text{.}\end{array}$