1
IIT-JEE 1998
MCQ (More than One Correct Answer)
+2
-0.5
Decrease in atomic number is observed during
A
alpha emission
B
beta amission
C
positron emisson
D
electron capture
2
IIT-JEE 1998
MCQ (More than One Correct Answer)
+2
-0.5
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
3
IIT-JEE 1998
MCQ (More than One Correct Answer)
+2
-0.5
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
4
IIT-JEE 1984
MCQ (More than One Correct Answer)
+1
-0.25
An isotone of $${}_{32}^{76}Ge$$ is
A
$${}_{32}^{77}Ge$$
B
$${}_{33}^{77}Ge$$
C
$${}_{34}^{77}Ge$$
D
$${}_{34}^{78}Ge$$
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