1

IIT-JEE 1992

MCQ (Single Correct Answer)
Which of the following relates to photons both as wave motion and as a stream of particles?
A
Inference
B
E = mc2
C
Diffraction
D
E = hv
2

IIT-JEE 1989

MCQ (Single Correct Answer)
The correct ground state electronic configuration of chromium atom is
A
[Ar] 3d5 4s1
B
[Ar] 3d4 4s2
C
[Ar] 3d6 4s0
D
[Ar] 4d5 4s1
3

IIT-JEE 1989

MCQ (Single Correct Answer)
The correct set of quantum numbers for the unpaired electron of chlorine atom is
A
n = 2, l = 1, m = 0
B
n = 2, l = 1, m = 1
C
n = 3, l = 1, m = 1
D
n = 3, l = 0, m = 0
4

IIT-JEE 1988

MCQ (Single Correct Answer)
The outermost electronic configuration of the most electronegative element is
A
ns2 np3
B
ns2 np4
C
ns2 np5
D
ns2 np6

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