A) Electrolytic reduction
B) Reduction by carbon
C) Reduction by another metal
D) Reduction by hydrogen
Correct Answer: B
Solution :
Reduction of metal by method (a), (c) and (d) will depend on the reduction potential of metal, so cannot bring about a non-spontaneous reduction (for which \[\Delta G=+ve\] ). In case of carbon reduction net \[\Delta G\] of overall reaction (reduction of metal and oxidation of carbon) can be made negative (i.e. spontaneous) at high temperature because entropy change \[(\Delta S)\] while oxidation of carbon is positive.You need to login to perform this action.
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