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Subjects
Science CBSE
Class 10
Metals and non-metals
The extraction, classification and properties
13.
Metal extracting and Refining: Match the correct one
Exercise condition:
2
m.
Answer variants:
Excess air
Pure metal
Impure metal
Acidic oxide
Basic oxide
Hydrogen gas
Water vapour
1
.
Anode
-
2
.
Roasting
-
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