Question
Chemistry Question on Colloids
The gold number range of some lyophilic colloids is given below: A: 0.005–0.01, B: 0.15–0.25, C: 0.04–1.0, D: 15–25
A
A
B
B
C
C
D
D
Answer
A
Explanation
Solution
The gold number is inversely related to the protective power of a colloid. A lower gold number indicates a better protective colloid. In this case, option A has the lowest gold number (0.005–0.01), making it the best protective colloid.