Chromite ore xrightarrow{Na_2CO_3 + O_2} A xr | vedclass

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(D) The extraction of chromium from chromite ore $(FeCr_2O_4)$ involves the following steps:$1$. Fusion of chromite ore with sodium carbonate in the p

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Both $(B)$ and $(C)$

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(D) The extraction of chromium from chromite ore $(FeCr_2O_4)$ involves the following steps:$1$. Fusion of chromite ore with sodium carbonate in the presence of air: $4FeCr_2O_4 + 8Na_2CO_3 + 7O_2 	o 8Na_2CrO_4 + 2Fe_2O_3 + 8CO_2$. Here,$A$ is $Na_2CrO_4$ (sodium chromate).$2$. Conversion of sodium chromate to sodium dichromate by acidification with sulfuric acid: $2Na_2CrO_4 + H_2SO_4 	o Na_2Cr_2O_7 + Na_2SO_4 + H_2O$. Here,$B$ is $Na_2Cr_2O_7$ (sodium dichromate).$3$. Sodium dichromate can be converted back to sodium chromate by adding $NaOH$: $Na_2Cr_2O_7 + 2NaOH 	o 2Na_2CrO_4 + H_2O$.Thus,both $A = Na_2CrO_4$ and $B = Na_2Cr_2O_7$ are correct.

Chromite ore $\xrightarrow{Na_2CO_3 + O_2} A$ $\xrightarrow[NaOH]{H_2SO_4} B$. Which of the following is correct?

Similar Questions

Potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride,gives brown-red vapours of:

Provide the structures of the following ions:
$1.$ $CrO_4^{2-}$
$2.$ $Cr_2O_7^{2-}$

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Which of the following is the correct statement?

Stainless steel is non-corrosive. This character is more prominent in

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