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How does the size of particles affect the colour of a gold sol?

Options

  1. ALarger particles result in a red colour
  2. BLarger particles result in a purple colour
  3. CLarger particles result in a blue colour
  4. DLarger particles result in a golden colour

Correct answer

D. Larger particles result in a golden colour

Step-by-step solution

The paragraph states that the finest gold sol is red in colour, and as the size of particles increases, it appears purple, then blue, and finally golden.

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