(chromite) is converted to Cr by following steps : Chromite I Na _2 CrO _4 II Cr _2 O…

CHEMISTRY · Single correct · CBSE · Chemistry · Metals and Non-metals · Metals and Non-metals

Problem

FeCr2O4\text{FeCr}_2\text{O}_4 (chromite) is converted to Cr by following steps : Chromite→INa2CrO4→IICr2O3→IIICr\text{Chromite} \xrightarrow{\text{I}} \text{Na}_2\text{CrO}_4 \xrightarrow{\text{II}} \text{Cr}_2\text{O}_3 \xrightarrow{\text{III}} \text{Cr} Reagents in I, II and III step might be : a. Na2CO3/air,Δ\text{Na}_2\text{CO}_3/\text{air}, \Delta, C, C b. NaOH/air,Δ\text{NaOH}/\text{air}, \Delta, C,Δ\text{C}, \Delta, Al,Δ\text{Al}, \Delta c. Na2CO3/air,Δ\text{Na}_2\text{CO}_3/\text{air}, \Delta, C,Δ\text{C}, \Delta, C,Δ\text{C}, \Delta conc. H2SO4,Δ\text{H}_2\text{SO}_4, \Delta, NH4Cl,Δ\text{NH}_4\text{Cl}, \Delta, C,Δ\text{C}, \Delta (1) Na2CO3/air,Δ\text{Na}_2\text{CO}_3/\text{air}, \Delta, C, C (2) NaOH/air,Δ\text{NaOH}/\text{air}, \Delta, C,Δ\text{C}, \Delta, Al,Δ\text{Al}, \Delta (3) Na2CO3/air,Δ\text{Na}_2\text{CO}_3/\text{air}, \Delta, C,Δ\text{C}, \Delta, C,Δ\text{C}, \Delta (4) conc. H2SO4,Δ\text{H}_2\text{SO}_4, \Delta, NH4Cl,Δ\text{NH}_4\text{Cl}, \Delta, C,Δ\text{C}, \Delta

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