1
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the following pairs has the same size?
A
Fe2+, Ni2+
B
Zr4+, Ti4+
C
Zr4+, Hf4+
D
Zn2+, Hf4+
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
Identify the incorrect statement among the following:
A
Lanthanoid contraction is the accumulation of successive shrinkages.
B
As a result of lanthanoid contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements.
C
Shielding power of 4$$f$$ electrons is quite weak.
D
There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu.

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