1.

FeCr_(2)O_(4)+NaOH+"air" to (A)+Fe_(2)O_(3)(A)+(B) to Na_(2)Cr_(2)O_(7) Na_(2)Cr_(2)O_(7)+X overset(Delta) to Cr_(3),O_(3) Cr_(3)+Y(Delta) to Cr Na_(2)CrO_(4) and Fe_(2)O_(3) are separated by :

Answer»

DISSOLVING in conc `H_(2)SO_(4)`
dissolving in `NH_(3)`
dissolving in `H_(2)O`
dissolving in dil. HCl

Solution :`Na_(2)Cr_(2)O_(7)` solubel in `H_(2)O` but `Fe_(2)O_(3)` is insoluble in `H_(2)O`


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