3. The finely divided dispersion of solid particles which are not visible to the naked eye and cannot be removed by ordinary filters are known as
A. dissolved impurities
B. colloidal impurities
C. suspended impurities
D. none of these
3. The finely divided dispersion of solid particles which are not visible to the naked eye and cannot be removed by ordinary filters are known as
A. dissolved impurities
B. colloidal impurities
C. suspended impurities
D. none of these