The colloidal solutions of gold prepared by different methods have different colours due to the
A. presence of different types of foreign particles depending upon the method of preparation of the colloid
B. different concentrations of gold
C. various forms of gold
D. presence of different size of the colloidal particles obtained in different methods.
Answer:D
The colloidal solutions of gold prepared by different methods have different colours due to the
A. presence of different types of foreign particles depending upon the method of preparation of the colloid B. different concentrations of gold C. various forms of gold D. presence of different size of the colloidal particles obtained in different methods.