Which one of the following is the best protective colloid ?
1.starch(gold no. =25)
2.Gum Arabic (gold no.=0.15)
3.Egg albumin (gold no.=0.08)
4.Gelatin (gold no.=0.005)
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Ans➡️ option ⏩ (4) .Gelatin (gold no.=0.005)
Because lesser the gold number better the protective colloid.
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Answer: The correct answer is (4) Gelatin. It is the best protective colloid out of all the given options.
Explanation:
Gelatin is the best protective colloid since it has the lowest gold number. The relation between gold number and protective ability is inverse. Greater the gold number, lesser is the protective ability of a lyophilic colloid( since a greater amount is required) and vice versa.
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