The gold numbers of gelatin, haemoglobin and sodium acetate are 
and 
, respectively. The protective actions will be in the order
haemoglobin 
sodium acetate 
gelatin 
sodium acetate 
gelatin 
haemoglobin
Text Solution
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The lyophilic colloids differ in their protective power. The protective power is measured in terms of gold number. It may be noted that smaller the value of the gold number, greater will be the protecting power of protective colloids.
Gold number of gelatin, haemoglobin and sodium acetate are 
and 
, respectively, hence, the protective actions will be in the order : gelatin 
Haemoglobin 
sodium acetate
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