Compound (A) is a light green crystalline solid it gives the following tests
i. If dissolves in dilute sulphuric acid .No gas is produced
ii A drop of `MnO_(4)` is added to the above solution .The pink colour disappears
iii Compound (A) is heated atrongly green (B) and (C ) with pungent smell came out .A brown residue (D) is lrft behind
iv The gas mixture `[(B) and (C)]` is passed into a dichromate solution .THe solution turms green
THe green solution from step (iv) gives a white precipitate (E ) with a solution of barium nitrate
vi . Residue (D) from (v) is heated on charcoal in reducing flame it gives a magnetic substance Identify the compound (A) to (E )

Answer

A: `FeSO_(4)7H_(2)O` B: `SO_(2)` C: `SO_(3)` D: `Fe_(2)O_(3)` E : `BaSO_(4)`