A) The iron has been reduced from \[+3\] to \[+2\] state.
B) The chromium has been oxidised from \[+3\] to \[+6\] state.
C) The carbon has been oxidised from \[+2\] to \[+4\] state.
D) There is no change in the oxidation state of the substances in the reaction.
Correct Answer: B
Solution :
\[\overset{+3+3}{\mathop{2Fe{{O}_{3}}.C{{r}_{2}}{{O}_{3}}}}\,+\overset{+4}{\mathop{4N{{a}_{2}}C{{O}_{3}}}}\,+3{{O}_{2}}\] \[\xrightarrow{{}}\overset{+3}{\mathop{2F{{e}_{2}}{{O}_{3}}}}\,+4N{{a}_{2}}Cr{{O}_{4}}+\overset{+4}{\mathop{4C{{O}_{2}}}}\,\] Hence, the oxidation state of chromium increases from \[+3\] to \[+6\].You need to login to perform this action.
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