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 ?
← JEE Main 2016 · 10 Apr · Shift 1
ChemistrySingle correct+4 / -1Question 40 of 90
JEE Main 2016 · 10 Apr · Shift 1, Chemistry question 40
Answer and worked solution
Official answer: A
The smaller the gold number, the better the protective colloid: gelatin (0.005-0.01).
Topics:Colloids