Q.

Bredig's arc method cannot be used to prepare colloidal solution of which of the following ?

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a

Pt

b

Fe

c

Ag

d

Au

answer is B.

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Detailed Solution

Bredig's arc method cannot be used to prepare iron sol as at high temperature iron reacts with steam. The rest of the metals do not react. with water.
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Bredig's arc method cannot be used to prepare colloidal solution of which of the following ?