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An inorganic compound on strong heating ...

An inorganic compound on strong heating gave a blackish brown powder and two oxides of sulphur. The powder was dissolved in HCl when a yellow solution was obtained. It gave a blood red colouration with thiocyanide ions. The inorganic compound is likely to be

A

`CoSO_(4)`

B

`FeSO_(4)`

C

`NiSO_(4)`

D

`MnSO_(4)`.

Text Solution

Verified by Experts

The correct Answer is:
B
(b) The compound is `FeS0_(4)`
`2FeSO_(4)overset("heat")rarrunderset("Blackesh brown powder")underset()(Fe_(2)O_(3)+SO_(2)+SO_(3))`
`Fe_(2)O_(3)+6HClrarrunderset("Yellow solution")underset()(2FeCl_(3)+3H_(2)O)`
`FeCl_(3)+3CNoverset(-)Sunderset("colouration")underset("Blood red")(rarrFe(CNS)_(3))+3CI^(-)`
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