Question

Strongest bond is between:

• A. $CsF$
• B. $NaCl$
• C. both $\left(A\right)$ and $\left(B\right)$
• D. none of these

Answer 1

The correct option is A $CsF$

According to Fajan's rule, the ionic character increases with the increase in the size of the cation and decrease in the size of anion. Hence $CsF$ has higher ionic character than $NaCl$ and therefore more stronger. Hence, $A$ is the correct option.