An inorganic compound [A] yellowish green in colour loses its water of crystallisation upon heating . When heated furthr, it changes to blackish brown
An inorganic compound [A] yellowish green in colour loses its water of crystallisation upon heating . When heated furthr, it changes to blackish brown powder [B] and also gives two oxides of sulphure. The power [B] on boiling with hydrochloric acid given a yellowish solution which gives a bloodred colouration on reacting with potassium thiocyanate.
The yellowish green compound [A] is
A. `CuSO_(4). 5H_(2)O`
B. `FeSO_(4).7H_(2)O`
C. `FeSO_(4).(NH_(4)) SO_(4). 6H_(2)O`
D. `Fe_(2)(SO_(4))_(3).7H_(2)O`
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Correct Answer - B
(b) The compound [A] is sulphate of some metal as it give two oxides of sulphur `(SO_(2)" and "SO_(3))` on heating. Its yellowish green colour suggests that (A) if `FeSO_(4).7H_(2)O` (green vitriol).
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