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General Principles and processes of Isolation of Elements
normal
$(I)$ $FeCr_2O_4+NaOH +$ air $\rightarrow (A)+Fe_2O_3$
$(II)$ $(A)+(B) \rightarrow Na_2Cr_2O_7$
$(III)$ $Na_2Cr_2O_7+X \xrightarrow{\Delta } Cr_2O_3$
$(IV)$ $Cr_2O_3+Y \xrightarrow{\Delta } Cr$
High temperature $( > 1000\,^o C)$ electrolytic reduction is necessary for isolating
A
$Al$
B
$Cu$
C
$C$
D
$F_2$
Solution
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Standard 12
Chemistry
