Question

Which metal sol can not be prepared by Bredig's arc method?

• A. $K$
• B. $Cu$
• C. $Au$
• D. $Pt$

Answer 1

The correct option is A $K$

Bredig's are method is suitable for the preparation of collodial solution of metals lite gold, silver, copper and platinum etc. It is not for the very reactive metals like $K,Na$.

Ans :- Option A.