1

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.
2

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
3

IIT-JEE 1989

MCQ (Single Correct Answer)
Which one of the following is the strongest base?
A
AsH3
B
NH3
C
PH3
D
SbH3
4

IIT-JEE 1989

MCQ (Single Correct Answer)
Which one of the following is the smallest in size?
A
N3-
B
O2-
C
F-
D
Na+

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