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

Options

A. `Fe overset (O_2, "heat ") to Fe _ 3 O _ 4 overset (CO, 600^(@)C) to FeO overset (CO, 700^(@)C) to Fe `
B. `Fe overset ("dil." H_2SO_4) to FeSO_4 overset (H_2SO_4, O_2) to Fe _2 (SO_4)_ 3 `
C. ` Fe overset (O_2,"heat")to FeO overset ("dil." H_2SO_4) to FeSO_ 4 overset ("heat") to Fe `
D. `Fe overset (Cl_2, "heat")to FeCl_3 overset ("heat, air ") to FeCl_2 overset (Zn) to Fe` .

Answer

A

Explanation

Option (a) is correct since Fe on heating with ` O _ 2 ` gives ` Fe_ 3 O _ 4 ` which upon reduction with CO first gives FeO and finally Fe. All other options are wrong as explained below :
Option (b) and (c ) are wrong because ` FeSO _ 4 ` on heating gives ` Fe_ 2 O_ 3 , SO_ 2 and SO_ 3 ` and not Fe.
` 2 FeSO _ 4 overset (Delta ) to Fe _ 2 O _ 3 + SO _ 3 + SO _ 2 `
Option (d) is wrong because in presence of air, reduction of ` FeCl_ 3 ` to ` FeCl _ 2 ` cannot occur.