In the metallurgical extraction of zinc from $ZnO$, the reducing agent used is

Which of the following metal oxides are reduced by CO?

The above process is:

The advantage of using carbon to reduce a number of oxides and other compounds are : 

Iron is extracted from magnetite by reduction with

The disadvantage of carbon reduction method are :

Highly electropositive metal (s) can not be commercially extracted by carbon reduction process at high temperature because these : 

What name is given to carbon reduction process for extracting the metal?

Carbon monoxide is more effective reducing agent than carbon below 983 K but above this temperature the reverse is true. If true enter 1 else 0.

Carbon monoxide cannot be used as a reducing agent to extract aluminium from alumina. Why?