The metal oxide which cannot be reduced to metal by carbon is
PbO
ZnO
Reduction with Carbon -
Roasted or calcined ore is mixed with suitable quantity of coke or charcoal which act as reducing agent and is heated to high temperature above its melting point.
- wherein
MxOy +yC xM +yCO
cannot be reduced to metal by carbon because of they are very reactions and reacts with carbon to form carides.
Option 1)
Incorrect
Option 2)
Correct
Option 3)
PbO
Incorrect
Option 4)
ZnO
Incorrect