This chapter is currently out of syllabus
1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The metal oxide which cannot be reduced to metal by carbon is
A
Al2O3
B
PbO
C
ZnO
D
Fe2O3
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Roasting of sulphides gives the gas X as a byproduct. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic, acts as a reducing agent and its acid has never been isolated. The gas X is
A
CO2
B
SO3
C
H2S
D
SO2
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with
A
carbon monoxide
B
copper (I) sulphide
C
sulphur dioxide
D
iron (II) sulphide.
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Aluminium is extracted from alumina (Al2O3) by electrolysis of a molten mixture of
A
Al2O3 + HF + NaAlF4
B
Al2O3 + CaF2 + NaAlF4
C
Al2O3 + Na3AlF6 + CaF2
D
Al2O3 + KF + Na3AlF6
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