Carbon cannot reduce the oxides of sodium to sodium because
Na has less affinity for oxygen
Na has more affinity for carbon than oxygen
Na is non-reactive
Na has more affinity for oxygen than carbon
Correct answer: (d)
Solution: The metals high up in the activity series are very reactive. They cannot obtain by reduction of their oxides by carbon. Since, sodium is high up in the acitivity series, carbon cannot reduce the oxides of sodium because it has more affinity for oxygen than carbon.