Displacement reactions 2

If a metal is less reactive than carbon electrolysis is used to extract it, true or false?

Has the following been reduced or oxidised based on the loss or gain of electrons - remember OILRIG

Mg(s) --> Mg2+(aq) + 2e-

Has the following been reduced or oxidised based on the loss or gain of electrons - remember OILRIG

Ca(s) --> Ca2+(aq) + 2e-

Has the following been reduced or oxidised based on the loss or gain of electrons - remember OILRIG

Fe(s) --> Fe3+(aq) + 3e-

Will a displacement reaction occur between Zinc sulphate and copper?

What is the correct word equation for this reaction

What is the correct definition of oxidation?

What is the correct definition of reduction?