1
JEE Main 2020 (Online) 4th September Evening Slot
+4
-1
The shortest wavelength of H atom in the Lyman series is $$\lambda$$1. The longest wavelength in the Balmar series of He+ is :
A
$${{5{\lambda _1}} \over 9}$$
B
$${{36{\lambda _1}} \over 5}$$
C
$${{27{\lambda _1}} \over 5}$$
D
$${{9{\lambda _1}} \over 5}$$
2
JEE Main 2020 (Online) 4th September Morning Slot
+4
-1
The region in the electromagnetic spectrum where the Balmar series lines appear is :
A
Microwave
B
Ultraviolet
C
Visible
D
Infrared
3
JEE Main 2020 (Online) 2nd September Evening Slot
+4
-1
The number of subshells associated with n = 4 and m = –2 quantum numbers is
A
8
B
2
C
16
D
4
4
JEE Main 2020 (Online) 2nd September Morning Slot
+4
-1
The figure that is not a direct manifestation of the quantum nature of atoms is :
A
B
C
D
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