Question

(a) Which metal is extracted from bauxite ore?
(b) Give the name of one ore of iron. Which iron compound is present in this ore? Write its chemical formula.
(c) Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
(d) Explain why, the galvanised iron article is protected against rusting even if the zinc layer is broken.
(e) Name a common metal which is highly resistant to corrosion.

Answer 1

Answer:

Explanation:

fgg

Answer 2

Answer

a) Aluminum is extracted from bauxite ore.

b) Hematite is an iron ore. Iron 3 oxide is present in this ore. It's chemical formula is Fe2O3.

c) Zinc is extracted from Cincinnati sulphide ore (zinc blende) by the process of roasting. It is heated strongly in the presence of air.

2ZnS + 3O2 ---- 2ZnO + 2SO2

Zinc oxide is further reduced to zinc with the help of carbon.

ZnO + C ------- Zn + CO.

d) Galvanized iron is protected even if the zinc layer is broken because unlike tin it is not electroplated on iron.

e) Aluminum is highly resistant to corrosion because it reacts with oxygen to form aluminum oxide which prevents corrosion.