Question

Which of the following is not correct observation based on Ellingham diagram?

• A. A metal can reduce the oxide of other metal which lies above it in Ellingham diagram
• B. $CO$ is more effective than $C$ as reducing agent below ${170}^{o}C$
• C. $\Delta G^o$ metal oxide is higher than of $C{O}_2$ hence oxidation of metal sulphides to oxides is not favourable
• D. Need for conversion of metal sulphide to metal oxide before reduction can be explained thermodynamically

Answer 1

The correct option is A A metal can reduce the oxide of other metal which lies above it in Ellingham diagram

As moving down of bottom of diagram metals becomes more reactive oxides will be hard to reduce.A given metal can reduce the oxides of other metal which lies above it in Ellingham diagram.