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Electrical disintegration or Bredig's ar...

Electrical disintegration or Bredig's arc method cannot be used for the preparation of colloidal sol of _________.

A

potassium

B

platinum

C

silver

D

gold

Text Solution

Verified by Experts

The correct Answer is:
A
This process involves dispersion as well condensation. Colloidal sols of metals such as gold, silver, platinum, etc, can be prepared by this method.
In this method, electric arc is struck between electrodes of the metal immersed in the dispersion medium. The intenses to form particles of colloidal size.
Since the dispersion medium used in Bredig's arc method is water, we can't use this method to make sols of alkali metals which violently react with water.
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