What happen when:
(a) Green Vitriol is strongly heated. , (b) `FeSO_(4)` reacts with potassium ferricyanide.
(c ) `Fe_(2)O_(3)` is fused with soda ash. , (d) Salts of iron (III) reacts with `NH_(4)SCN.`
(e ) Zinc oxide and cobalt oxide is fused. ,(f) Malachite is made to react with dilute `H_(2)SO_(4)`
(g) copper sulphate is exposed to air for longer period
(h)Lunar caustic is made to react with sodium hydroxide and then product is dried.
(i) Potassium dichromate reacts with cold and concentrated `H_(2)SO_(4)`

Explanation

(a). `FeSO_(4).7H_(2)Ounderset(H_(2)O)overset(300^(@)C)toFeSO_(4)underset("tempt")overset(high)toFe_(2)O_(3)+SO_(2)+SO_(3)`
(b) `CuCO_(3).Cu(OH)_(2)+2H_(2)SO_(4)to2CuSO_(4)+3H_(2)O+CO_(2)uarr`
(c) `CuSO_(4).5H_(2)Ounderset("ettloresces")overset(air)toCuSO_(4).3H_(2)O`
(d) `2AgNO_(3)+2NaOHtoAg_(2)Odarr("black")+2NaNO_(3)+H_(2)O` ltbr (e). `5AgNO_(3)+3I_(2)("excess")+H_(2)OtoHIO_(3)+5AgIdarr("yellow")+5HNO_(3)`
(f) `K_(2)Cr_(2)O_(7)+2H_(2)SO_(4)(conc.&" "cold)to2CrO_(3)(red)+2KHSO_(4)+H_(2)O`