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A compound of iron exists as a dimer in ...

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

A

`Fe_3O_4`

B

`FeSO_4`

C

`FeCl_3`

D

`FeO_3`

Text Solution

Verified by Experts

The correct Answer is:
c
The solution is acidic due to formation of HCl and brown due to `Fe(OH)_3`.
`FeCl_3+3H_2OtoFe(OH)_3+3HCl`
`FeCl_3` exists as `Fe_2Cl_6` (a dimer) in vapour state.
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