Question

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 1

The Correct Option is A

The gold number quantifies a colloid's protective capability. It represents the minimal quantity (in milligrams) of a lyophilic colloid needed to avert the coagulation of 10 ml of gold sol when 1 ml of a 10% sodium chloride solution is added. A lower gold number signifies superior protective power.

Evaluating the provided choices:

• A: 0.005–0.01 - This range is the lowest, implying the greatest protective power.
• B: 0.15–0.25 - This range is higher than A, indicating reduced protective power.
• C: 0.04–1.0 - This range is extensive but generally higher than A.
• D: 15–25 - This is the highest range, suggesting minimal protective power.

Given that option A presents the lowest gold number range, colloid A exhibits the highest protective power among the choices.

The correct answer is option A.