Milk is best described as a colloidal solution. This classification arises from its composition and properties:
Therefore, based on these observations and properties, milk is classified as a colloidal solution.
‘X’ is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of 10% NaCl is added. What is the gold number of ‘X’?