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Subjects
Science CBSE
Class 10
Metals and non-metals
The extraction, classification and properties
25.
Extraction of metals: choose the correct answer
Exercise condition:
3
m.
1
.
Thermit reaction refers to which of the following?
Reaction of iron (III) oxide with aluminium
Reaction of iron (III) oxide with magnesium
Reaction of Iron (II) oxide with aluminium
Reaction of iron (III) oxide with copper
2
.
The non-metal that is used to convert metal oxides to their metal counterparts is
Oxygen
Lithium
Carbon
Hydrogen
3
.
The correct sequence for producing pure mercury metal is
Mercury ore → Mercury oxide → Mercury
Mercury ore → Mercury
Mercury ore → Mercury sulphate → Mercury
None of these
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