Question

Give the effect of heat on metal oxides based on the activity series ?

Answer 1

Oxides of metals like Na, K, Ca, Mg, Al are stable to heat and so can be reduced only by
electrolysis.
Zinc oxide can be reduced by coke only.
Oxides of iron, lead and copper are reduced by C, CO, H2 and NH3.
Oxides of mercury and silver decompose to give metal and oxygen.