Surface ChemistryHard
Question
A reddish brown sol (containing Fe3+) is obtained by:
Options
A.the addition of small amount of FeCl3 solution to freshly prepared Fe(OH)3 precipitate
B.the addition of Fe(OH)3 to freshly prepared FeCl3 solution
C.the addition of NH4OH to FeCl3 solution dropwise
D.the addition of NaOH to FeCl3 solution dropwise
Solution
Reddish brown sol is prepared by adding FeCl3 in Fe(OH)3 precipitate.
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