Question

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

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

Answer 1

Answer: (D)

The correct reactions are as follows:
(a) $Fe +$ dil. $H _{2} SO _{4} \longrightarrow FeSO _{4}+ H _{2}$
$H _{2} SO _{4}+2 FeSO _{4}+\frac{1}{2} O _{2} \longrightarrow Fe _{2}\left( SO _{4}\right)_{3}+ H _{2} O$
$Fe _{2}\left( SO _{4}\right)_{3} \stackrel{\Delta}{\longrightarrow} Fe _{2} O _{3}(s)+3 SO _{3} \uparrow$
The given reaction is incorrect in question