Question

(i) What is the colour of gold nanoparticles ?​

Answer 1

Explanation:

Gold nanoparticles will have a red color in solution, as seen in the picture to the right. If the particles aggregate, the solution will appear blue/purple and can progress to a clear solution with black precipitates.

Answer 2

ANSWER

Red

Explanation:

Unaggregated gold nanoparticles will have a red color in solution, as seen in the picture to the right. If the particles aggregate, the solution will appear blue/purple and can progress to a clear solution with black precipitates.