1.

How many of the following statements are correct for green vitriol? 1. it can be used for the preparation of Mohr's salt. ltbr 2. It is a hydrated salt and its anhydrous form is white in colour. 3. The decomposition reaction of its anhydrous form is redox in nature. 4. It is used for making fenton's reagent used as a catalyst in organic chemistry. 5. It can be used for the preparation of Potassium ferrocynide. 6. It has same number of molcules of water of crystallization as white vitriol or blue vitriol 7. It turns brownish-yellow on exposure to atmosphere. 8. Its aqueous solution is acidic in natrue due to hydrolysis. 9. Out of the decomposition products of its anhydrous form, only one can turn acidified K_(2)Cr_(2)O_(7) solution green.

Answer»


Solution :1. `FeSO_(4)+(NH_(4))_(2)SO_(4)+6H_(2)OtoFeSO_(4).(NH_(4))_(2)SO_(4).6H_(2)O` (Mohr salt)
2. Green vitriol is `FeSO_(4).7H_(2)O&` its anhydrous form `(FeSO_(4))` is white.
3. `overset(+2)(2FE)overset(+6)(SO_(4))overset(Delta)tooverset(+3)(Fe_(2))O_(3)+overset(+4)(SO_(4))+SO_(3)(REDOX)`
4. Fact (Fenton's reagent `=FeSO_(4)+H_(2)O_(2)`)
5. `UNDERSET(aq)(FeSO_(4))+underset(aq)(6KCN)toK_(4)[Fe(CN)_(6)]`
6. White vitriol is `ZnSO_(4).7H_(2)O&` blue vitriol is `CuSO_(4).5H_(2)O`
7. Due to its oxidation to `Fe^(3+)`
8. `Fe^(2+) +2H_(2)OhArrFe(OH)_(2)darr+2H^(+)` (acidic solution)
9. Only `SO_(2)` can TURN acidified `K_(2)Cr_(2)O_(7)` solution green.


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