The size of colloidal particle is

Options

A. ` 10^(-3)` to ` 10^(-9)`m
B. `10^(-9)` to ` 10^(-12)` m
C. `10^(-6)` to `10^(-9)` m
D. `10^(-12)` to `10^(-19)`m .

Answer

C

Explanation

A system is said to be in colloidal state if particles of one or more components have the same size range ` 10^(-6)m` to ` 10^(-9)`n. In other words, the colloidal solution is a heterogeneous dispersion of solute particles size ranging from ` 10^(-6)` m into the solvent . Particle are visible only with an ultra microscope .