Which of the following impurities can be separated from a colloidal solution by electrodialysis?

If $1000 \ mg$ of a lyophilic colloid prevents the coagulation of $100 \ mL$ of a lyophobic sol,then the gold number (protective value) is ......... $mg$.

$100 \; mL$ of $5 \% \; (w/v)$ solution of $NaCl$ in water was prepared in a $250 \; mL$ beaker. Albumin from the egg was poured into the $NaCl$ solution and stirred well. This resulted in a/an:

Which of the following statements is not correct?

Sulphur sol contains

The size of a colloidal particle is: