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?
(a) Gelatin
(b) Starch
(c) Oleate
(d) Gum Arabic
IIT JEE (Online 2016)
Answers
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4
Answer
(a) Gelatin
★Explanation★
Gold number is inversely proportional to the protective power.
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