1
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Change Language
The catalytic activity of transition metals and their compounds is ascribed mainly to
A
their magnetic behaviour
B
their unfilled $$d$$-orbitals
C
their ability to adopt variable oxidation states
D
their chemical reactivity
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
Identify the alloy containing a non-metal as a constituent in it.
A
Invar
B
Steel
C
Bell metal
D
Bronze
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
Change Language
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 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Acidified K2Cr2O7 solution turns green when Na2SO3 is added to it. This is due to the formation of
A
Cr2(SO4)3
B
CrO$$_4^{2 - }$$
C
Cr2(SO3)3
D
CrSO4

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