The volume of a colloidal particle `V_C` as compared to the volume of a solute particle in a true solution `V_S` could be

Options

A. `V_C/V_S~~1`
B. `V_C/V_S =1`
C. `V_C/V_S = 10^(-3)`
D. `Al^(3+) gt Ba^(2+) gt Na^(+)`

Explanation

For a true solution, the diameter range is 1 to < 10 A, and for colloidal solution, diameter range is 10 - 1000 Å. Taking lower limits,
`V_C/V_S = (4/3pir_c^3)/(4/3pir_s^3 )=(r_c/r_s)^3`
`r_c = 10/2 = 5Å, r_s = 1/2 = 0.5 Å`
`V_c/V_s = (5/0.5)^3 = 10^3/1`