Q1: Size range of the colloidals particles is

ANS:A - 5 - 200 milli-microns

The size range of colloidal particles typically falls within the range of 5 - 200 milli-microns. Colloidal particles are larger than individual molecules but smaller than particles that can be seen with the naked eye. They range in size from approximately 1 nanometer (nm) to 1000 nanometers (1 micrometer or 1 micron). In the given options, 5 - 200 milli-microns represents this range, where 1 milli-micron is equivalent to 1 nanometer.