The colloidal solutions of gold prepared by different methods have different colours due to the:
Correct answer: D. presence of different size of the colloidal particles obtained in different methods.
- 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.
Explanation
Colloidal solutions of gold prepared by different methods have different colors due to the presence of different size of the colloidal particles obtained in different methods.
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About Solutions and Colloids
Solutions are described using molarity, molality, normality, mole fraction, percentage concentration and parts per million. Coverage also includes vapour-pressure lowering, boiling-point elevation, freezing-point depression and osmotic pressure, then distinguishes true solutions, colloids and suspensions by particle size, stability, light scattering and settling.
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