JEE Main 20146 April

JEE Main 2014 · 6 April · Chemistry · General Principles and Processes of Isolation of Metals

Which series of reactions correctly represents the chemical...

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

Options

A $Fe\overset{dilute{H}_{2}{SO}_{4}}{\to}{FeSO}_{4}\overset{{H}_{2}{SO}_{4}, {O}_{2}}{\to}{Fe}_{2}{\left({SO}_{4}\right)}_{3}\overset{heat}{\to}Fe$
B $Fe\overset{{O}_{2}, heat}{\to}FeO\overset{dilute{H}_{2}{SO}_{4}}{\to}{FeSO}_{4}\overset{heat}{\to}Fe$
C $Fe\overset{{Cl}_{2}, heat}{\to}{FeCl}_{3}\overset{heat, air}{\to}{FeCl}_{2}\overset{Zn}{\to}Fe$
D $Fe\overset{{O}_{2}, heat}{\to}{Fe}_{3}{O}_{4}\overset{CO, 600 ℃}{\to}FeO\overset{CO, 700 ℃}{\to}Fe$

D. $Fe\overset{{O}_{2}, heat}{\to}{Fe}_{3}{O}_{4}\overset{CO, 600 ℃}{\to}FeO\overset{CO, 700 ℃}{\to}Fe$

This is the blast furnace reaction.

\left(\text{Fe}\overset{dilute{H}_{2}{SO}_{4}}{\to}{FeSO}_{4}\overset{{H}_{2}{SO}_{4}, {O}_{2}}{\to}{Fe}_{2}{\left({SO}_{4}\right)}_{3}\overset{heat}{\to}Fe\right)

and \left(\text{Fe}\overset{{O}_{2}, heat}{\to}FeO\overset{dilute{H}_{2}{SO}_{4}}{\to}{FeSO}_{4}\overset{heat}{\to}Fe\right)

cannot be the answer since,

{FeSO}_{4}

on heating gives

FeO

and

{SO}_{2}

.<br /><br />\left(Fe\overset{{Cl}_{2}, heat}{\to}{FeCl}_{3}\overset{heat, air}{\to}{FeCl}_{2}\overset{Zn}{\to}Fe\right)

is wrong because

{FeCl}_{3}

, on heating in air, stays as

{Fe}^{+ 3}

and does not form

{FeCl}_{2}