1
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the following ions has electronic configuration [Ar]3d6?
(At. nos. Mn = 25, Fe = 26, Co = 27, Ni = 28)
A
Ni3+
B
Mn3+
C
Fe3+
D
Co3+
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
A
3d54s1
B
3d54s2
C
3d24s2
D
3d34s2
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
The correct order of decreasing second ionisation enthalpy of Ti(22), V(23), Cr(24) and Mn(25) is
A
Mn > Cr > Ti > V
B
Ti > V > Cr > Mn
C
Cr > Mn > V > Ti
D
V > Mn > Cr > Ti
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Which one of the following ions is the most stable in aqueous solution?
(At. No. Ti = 22, V = 23, Cr = 24, Mn = 25)
A
V3+
B
Ti3+
C
Mn3+
D
Cr3+
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