JEE MAIN - Chemistry (2014 (Offline) - No. 19)
Which series of reactions correctly represents chemical relations related to iron and its compound?
Fe $$\buildrel {dil.\,{H_2}S{O_4}} \over
\longrightarrow $$ FeSO4 $$\buildrel {{H_2}S{O_4},{O_2}} \over
\longrightarrow $$ Fe2(SO4)3 $$\buildrel {heat} \over
\longrightarrow $$ Fe
Fe $$\buildrel {{O_2} \, {, heat}} \over
\longrightarrow $$ FeO $$\buildrel {dil.\,{H_2}S{O_4}} \over
\longrightarrow $$ FeSO4 $$\buildrel {heat} \over
\longrightarrow $$ Fe
Fe $$\buildrel {{Cl_2} \, {, heat}} \over
\longrightarrow $$ FeCl3 $$\buildrel {heat, \, air} \over
\longrightarrow $$ FeCl2 $$\buildrel {Zn} \over
\longrightarrow $$ Fe
Fe $$\buildrel {{O_2},\,heat} \over
\longrightarrow $$ Fe3O4 $$\buildrel {CO,\,{{600}^o}C} \over
\longrightarrow $$ FeO $$\buildrel {CO,\,{{700}^o}C} \over
\longrightarrow $$ Fe
Explanation
In equation
(i) $$\,\,\,$$ $$F{e_2}{\left( {S{O_4}} \right)_3}\,\,\,$$
and in equation
(ii) $$\,\,\,$$ $$F{e_2}{\left( {S{O_4}} \right)_3}$$
on decomposing will form oxide instead of $$Fe.$$
The correct sequence of reactions is
$$Fe\buildrel {{O_2},heat} \over \longrightarrow \,\,F{e_3}{O_4}\buildrel {Co,{{600}^ \circ }C} \over \longrightarrow $$
$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,F{e_2}{\left( {S{O_4}} \right)_3}\buildrel \Delta \over \longrightarrow Fe$$
(i) $$\,\,\,$$ $$F{e_2}{\left( {S{O_4}} \right)_3}\,\,\,$$
and in equation
(ii) $$\,\,\,$$ $$F{e_2}{\left( {S{O_4}} \right)_3}$$
on decomposing will form oxide instead of $$Fe.$$
The correct sequence of reactions is
$$Fe\buildrel {{O_2},heat} \over \longrightarrow \,\,F{e_3}{O_4}\buildrel {Co,{{600}^ \circ }C} \over \longrightarrow $$
$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,F{e_2}{\left( {S{O_4}} \right)_3}\buildrel \Delta \over \longrightarrow Fe$$
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