D-And F-Block Elements Ques 477

Question: A compound of iron exists as a dimer in vapour state. It is hygroscopic in nature and dissolves in water giving brown acidic solution. The compound is

Options:

A) $ Fe_3O_4 $

B) $ FeSO_4 $

C) $ FeCl_3 $

D) $ FeO_2 $

Show Answer

Answer:

Correct Answer: C

Solution:

The solution is acidic due to formation of $ HCl $ and brown due to $ Fe{{( OH )}_3}. $ $ FeCl_3+3H_2O\to \underset{Brown}{\mathop{Fe{{(OH)}_3}}},+3HCl $



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