1

IIT-JEE 1996

MCQ (Single Correct Answer)
Which of the following has the maximum number of unpaired electrons?
A
Mg2+
B
Ti3+
C
V3+
D
Fe2+
2

IIT-JEE 1995 Screening

MCQ (Single Correct Answer)
Which has most stable +2 oxidation state?
A
Sn
B
Pb
C
Fe
D
Ag
3

IIT-JEE 1992

MCQ (Single Correct Answer)
The statement that is not correct for the periodic classification of element is
A
The properties of elements are the periodic functions of their atomic numbers
B
Non-metallic elements are lesser in number than metallic elements
C
The first ionisation energies of elements along a period do not vary in a regular manner with increase in atomic number
D
For transition elements the d-subshells are filled with electrons monotonically with increase in atomic number.
4

IIT-JEE 1990

MCQ (Single Correct Answer)
Amongst the following elements (whose electronic configuration are given below), the one having the highest ionization energy is:
A
[Ne] 3s23p1
B
[Ne] 3s23p3
C
[Ne] 3s23p2
D
[Ne] 3d104s24p3

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