FeCr2O4 chromite is converted to Cr by following steps-Chromite Na2CrO4Cr2O3 Cr I-II and III are-

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Byju's Answer

Standard XII

Chemistry

Enthalpy of Solution

FeCr2O4 chrom...

Question

$F e {C r}_{2} O_{4}$ (chromite) is converted to $C r$ by following steps:
Chromite $I \to {N a}_{2} C r O_{4} I I - \to {C r}_{2} O_{3} I I I - - \to C r$
$I, I I$ and $I I I$ are:

I - {N a}_{2} {C O}_{3} / a i r, Δ

;

I I - C

;

I I I - C

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I - {N a}_{2} {C O}_{3} / a i r, Δ

;

I I - C, Δ

;

I I I - A l, Δ

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I - N a O H / a i r, Δ

;

I I - C, Δ

;

I I I - M g, Δ

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I - c o n c . H_{2} {S O}_{4} / a i r, Δ

;

I I - {N H}_{4} C l, Δ

;

I I I - C, Δ

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Solution

The correct option is D $I - {N a}_{2} {C O}_{3} / a i r, Δ$ ; $I I - C, Δ$ ; $I I I - A l, Δ$
Chromite is converted into sodium chromate and then to Cr by given reaction:

$F e C r_{2} O_{4} N a_{2} C O_{3} / a i r, Δ - -------- \to {N a}_{2} C r O_{4} C \to {C r}_{2} O_{3} A l, Δ - -- \to C r$

Hence, option B is correct.

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FeCr2O4 (chromite) is converted to Cr by following steps:ChromiteI→Na2CrO4II−→Cr2O3III−−→CrI,II and III are:

The correct option is D I−Na2CO3/air,Δ; II−C,Δ; III−Al,ΔChromite is converted into sodium chromate and then to Cr by given reaction:FeCr2O4Na2CO3/air,Δ−−−−−−−−−→Na2CrO4C→Cr2O3Al,Δ−−−→CrHence, option B is correct.

$F e {C r}_{2} O_{4}$ (chromite) is converted to $C r$ by following steps:
Chromite $I \to {N a}_{2} C r O_{4} I I - \to {C r}_{2} O_{3} I I I - - \to C r$
$I, I I$ and $I I I$ are: