Name the reducing agent used in the extraction of zinc from zinc oxide. Write the chemical equation for this reaction. 

(a) Name the reducing agent used in the extraction of zinc oxide. Give the equation. (b) What is the principle involved in zone refining of metals?

Name an oxidising agent used in the Etard's reaction

Carbon is used as a reducing agent in the extraction of :

Extraction of zinc from zinc blende is achieved by :

Name the reducing agent uses in alumino thermite process.

Explain the extraction of zinc from zinc oxide or from zinc blende (ZnS).

Give the reaction involved during the extraction of zinc from its ore by a. Roasting of zinc or b. Calcination of zinc ore OR How are roasting and calcination used in the extraction of zinc? Explain with the help of chemical equations. After these processes is reduction necessary to obtain zinc? Why