Fe_2Cr_2O_4 + Na_2CO_3 + O_2 xrightarrow{text | vedclass

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(D) The reaction sequence is as follows:$1$. Fusion of chromite ore $(Fe_2Cr_2O_4)$ with $Na_2CO_3$ in the presence of air gives sodium chromate $(Na_

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(D) The reaction sequence is as follows:$1$. Fusion of chromite ore $(Fe_2Cr_2O_4)$ with $Na_2CO_3$ in the presence of air gives sodium chromate $(Na_2CrO_4)$,which is $[X]$.$2$. Acidification of $[X]$ gives sodium dichromate $(Na_2Cr_2O_7)$,which is $[Y]$.$3$. Reaction of $[Y]$ with $H_2O_2$ in acidic medium gives chromium pentoxide $(CrO_5)$,which is $[Z]$.Analysis of statements:- In $Na_2CrO_4$,$Na_2Cr_2O_7$,and $CrO_5$,the oxidation state of $Cr$ is $+6$. Thus,statement $(A)$ is correct.- $CrO_5$ $([Z])$ is a deep blue-violet coloured compound that decomposes rapidly in aqueous solution into $Cr^{+3}$ and $O_2$. Thus,statement $(B)$ is correct.- Saturated solution of $[Y]$ $(Na_2Cr_2O_7)$ with conc. $H_2SO_4$ gives $CrO_3$ (chromic anhydride),which is a bright orange compound. Thus,statement $(C)$ is correct.Since all statements are correct,the answer is $(D)$.

$Fe_2Cr_2O_4 + Na_2CO_3 + O_2$ $\xrightarrow{\text{Fusion}} [X]$ $\xrightarrow[H_2O]{H^+} [Y]$ $\xrightarrow{H_2O_2/H^+} [Z]$
Which of the following statements is true for the compounds $[X], [Y]$ and $[Z]$?

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$Fe_2Cr_2O_4 + Na_2CO_3 + O_2$ $\xrightarrow{\text{Fusion}} [X]$ $\xrightarrow[H_2O]{H^+} [Y]$ $\xrightarrow{H_2O_2/H^+} [Z]$Which of the following statements is true for the compounds $[X], [Y]$ and $[Z]$?