The one having maximum protective power (G.No. = Gold number)
Gelatin (G.No.0.01)
Engg albumin (G.No.015 to 0.25)
Starch (G.No.25)
Gum Arabic (G.No.15)
Lower the gold number, higher its protective power
Gold number of some lyophilic sols are
(i)Casein0.01(ii)Haemoglobin0.03(iii)Gum Arabic0.15(iv)Sodium oleate0.40
Which has maximum protective power?