Which one of the following has minimum value of size of cation/anion ratio ?

Options

A. `NaCl`
B. `KCl`
C. `MgCl_2`
D. `CaF_2`

Answer

C

Explanation

The size of `Mg^(2+)` is minimum among `Na^+ , Ca^(2+), K^+` and `Mg^(2+)` and size of `Cl^-` is more than `F^-`, so the ratio of size of cation and anion are minimum in `MgCl_2`.