How many of the following are colloid?Sodium chloride, Starch solution, Cane sugar, Salt water, KCl solution, Sea water, Protein solution, Dilute HCl, Conc.HCl and Blood

Starch molecules have colloidal dimensions. Blood is a –vely charged colloidal system. Rest of the compounds, i.e., NaCl, urea and cane sugar formtrue solution in water. Protein solution is also a colliodal solution.