WorksheetsEPT
Total questions: 5
Worksheet time: 3mins
Name
Class
Date
1.
The metallic oxide which cannot be reduced by normal reducing agents.
a)
Magnesium oxide
b)
Copper (II) oxide
c)
Zinc oxide
d)
Iron(III) oxide
2.
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as
a)
Smelting
b)
Ore dressing
c)
Calcination
d)
Bessemerisation
3.
The process of dressing of the ore which involves separation of ore & gangue due to preferential wetting
a)
Magnetic separation
b)
Hydrolytic method
c)
Froth flotation method
d)
Chemical method
4.
The metallic oxide reduced to metal generally by thermal decomposition
a)
ZnO
b)
MgO
c)
HgO
d)
Al2O3
5.
Which ore is concentrated by Froth floatation process?
a)
Carbonate ore
b)
Hydrated ore
c)
Sulphide ore
d)
None
100 %
