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The colloidal solutions of gold prepared...

The colloidal solutions of gold prepared by different methods have different colors due to :

A

Variable valency of gold

B

Different concentration of gold particles

C

Different type of impurities

D

Different diameters of colloidal particles

Text Solution

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The correct Answer is:
D
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Colloidal solutions of metals like gold can be prepared when their salt solutions react with certain substances like SnCl_(2) , formaldeyde, phenyl hydrazine , etc. 2AuCl_(3) + 3SnCl_(2) to 3SnCl_(4)+ underset("sol")(2Au) The above method is an example of