Which series of reactions correctly represents chemical reactions related to iron and its compound ?

Options

A. `Fe overset("dil". H_(2)SO_(4))to FeSO_(4) overset(H_(2)SO_(4)*O_(2))to Fe_(2)(SO_(4))overset("heat")toFe`
B. `Fe overset(O_(2)"heat")to FeO overset("dil".H_(2)SO_(4))to FeSO_(4) overset("heat")to Fe`
C. `Fe overset(Cl_(2)"heat")FeCl_(3) overset("heat.air")to FeCl_(2) overset(Zn)to Fe`
D. `Feoverset(O_(2)"heat")to Fe_(3)O_(4) overset("Co".500^(@)C)to FeO overset(Co.700^(@)C)toFe`

Answer

D

Explanation

Sequence D is correct.
`Fe overset(O_(2)"heat")to Fe_(3)O_(4)`. This reaction is combustion of iron.
`Fe_(3)O_(4) underset(600^(@)C)overset(CO)to FeOunderset(700^(@)C)overset(CO)to Fe. `
These reactions correspond to production of iron by the reduction of `Fe_(3)O_(4)` in blast furnace.