Identify the method of preparation of the colloids which is shown in the given figure.
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a
Chemical method
b
Peptisation
c
Bredig's arc method
d
All of these
answer is C.
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Detailed Solution
Bredig's arc method or electrical disintegration is a method of preparation of colloidal solution, of metals such as gold, silver or platinum. This method consists of both dispersion and condensation.