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General Principles and processes of Isolation of Elements
normal
$FeC{r_2}{O_4}$ (chromite) is converted to $Cr$ by following steps :
Chromite $\xrightarrow{I}NaCr{O_4}\,\,\xrightarrow{{II}}\,C{r_2}{O_3}\,\xrightarrow{{III}}\,Cr$
Reagents in $I,\,II$ and $III$ step might be
$I-$ Step $-$ $II-$ Step $-$ $III-$ Step
A
$Na_2CO_3/air,\,\Delta $ $-$ $C$ $-$ $C$
B
$NaOH/air,\,\Delta $ $-$ $C,\,\Delta $ $-$ $Al,\,\Delta $
C
$Na_2CO_3/air,\,\Delta $ $-$ $C,\,\Delta $ $-$ $C,\,\Delta $
D
$conc.H_2SO_4,\,\Delta $ $-$ $NH_4Cl,\,\Delta $ $-$ $C,\,\Delta $
Solution
Chromite $\xrightarrow{{NaOH/air,\,\Delta }}NaCr{O_4}\,\,\xrightarrow{{C,\Delta }}\,C{r_2}{O_3}\,\xrightarrow{{Al,\,\,\Delta }}\,Cr$
Standard 12
Chemistry
