1.

Which will not give the usual test for iron:

Answer»

`K_2Fe_2(SO_4)_4. 24H_2O`
`(NH_4)_2Fe(SO_4)_2. 6H_2O`
`K_3[FE(CN)_6]`
`Fe_2(SO_4)_3`

ANSWER :C


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