1
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
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which one of the following is a mineral of iron?
A
Malachite
B
Cassiterite
C
Pyrolusite
D
Magnetite
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the statements is not true?
A
On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed.
B
Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis.
C
K2Cr2O7 solution in acidic medium is orange.
D
K2Cr2O7 solution becomes yellow increasing the pH beyond 7.
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Identify the alloy containing a non-metal as a constituent in it.
A
Invar
B
Steel
C
Bell metal
D
Bronze
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