Gold numbers of some colloids are: Gelatin 0. | vedclass

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(A) The protective power of a colloid is inversely proportional to its gold number.$	ext{Gold number} \propto \frac{1}{	ext{Protective power}}$This

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Gelatin

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(A) The protective power of a colloid is inversely proportional to its gold number.$	ext{Gold number} \propto \frac{1}{	ext{Protective power}}$This means that the smaller the value of the gold number of a lyophilic sol,the greater is its protective action.Comparing the given values: Gelatin $(0.005-0.01)$ has the lowest gold number among the options.Therefore,Gelatin is the best protective colloid.

Gold numbers of some colloids are: Gelatin $0.005-0.01$,Gum arabic: $0.15-0.25$; Oleate: $0.04-1.0$; Starch: $15-25$. Which among these is a better protective colloid?

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