Multiple choice

The colour of colliodal particles of gold sol obtained by different methods is different because of

  1. different concentration of gold particles

  2. different types of impurities

  3. Variable valency of gold

  4. different diameters of dispersed particles

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The color of colloidal gold sol depends on the size of the dispersed particles, as different sizes scatter different wavelengths of light.