Which of the following represents the correct chemical reactions related to iron and its compounds?

  • A
    $Fe$ $\xrightarrow{dil. H_2SO_4} FeSO_4$ $\xrightarrow{H_2SO_4, O_2} Fe_2(SO_4)_3$ $\xrightarrow{heat} Fe_2O_3$
  • B
    $Fe$ $\xrightarrow{O_2, heat} Fe_3O_4$ $\xrightarrow{dil. H_2SO_4} FeSO_4$ $\xrightarrow{heat} Fe_2O_3$
  • C
    $Fe$ $\xrightarrow{Cl_2, heat} FeCl_3$ $\xrightarrow{H_2, heat} FeCl_2$ $\xrightarrow{Zn} Fe$
  • D
    $Fe$ $\xrightarrow{O_2, heat} Fe_3O_4$ $\xrightarrow{CO, 600 ^\circ C} FeO$ $\xrightarrow{CO, 700 ^\circ C} Fe$

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