1.

FeCr_(2)(chromite ) is a good soure of chromium and its compounds like Na_(2)CrO_(4),Na_(2)Cr_(2)O_(7) P:FeCr_(2)O_(4)+NaOH+airto A+Fe_(2)O_(3)Q: A+Bto Na_(2)Cr_(2)O_(7)R:Na_(2)Cr_(2)O_(7)+Xoverset(Delta)toCr_(2)O_(3)S:Cr_(@)O_(3)+YtoCr 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

Answer :a


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