1

IIT-JEE 1999

MCQ (More than One Correct Answer)
Ground state electronic configuration of nitrogen atom can be represented by
A
B
C
D
2

IIT-JEE 1998

MCQ (More than One Correct Answer)
The energy of an electron in the first Bohr orbit of H atom is -13.6 eV. The possible energy value(s) of the excited state(s) for electrons in Bohr orbits of hydrogen is (are)
A
-3.4 eV
B
-4.2 eV
C
-6.8 eV
D
-1.5 eV
3

IIT-JEE 1998

MCQ (More than One Correct Answer)
Which of the following statement(s) is (are) correct?
A
The electronic configuration of Cr is [Ar] 3d54s1.(Atomic number of Cr = 24)
B
The magnetic quantum number may have negative value
C
In silver atom, 23 electrons have a spin of one type and 24 of the opposite type. (Atomic number of Ag = 47)
D
The oxidation state of Nitrogen in HN3 is -3
4

IIT-JEE 1998

MCQ (More than One Correct Answer)
Decrease in atomic number is observed during
A
alpha emission
B
beta amission
C
positron emisson
D
electron capture

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