VITEEE 2011 Paper

Section: Chemistry

Question : 68 of 120

Marks: +1, -0

Consider the following equation, which represents a reaction in the extraction of chromium from its ore
2Fe2O3 . Cr2O3 + 4Na2CO3+3O2 → 2Fe2O3+4Na2CrO4 + 4CO2
Which one of the following statements about the oxidation states of the substances is correct?

The iron has been reduced from +3 to +2 state.
The chromium has been oxidised from +3 to +6 sta
The carbon has been oxidised from +2 to +4 state.
There is no change in the oxidation state of the substances in the reaction

Validate

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