1
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

During $$\alpha$$-decay, atomic mass of parent nuclei is

A
decreased by 2 units
B
increased by 2 units
C
decreased by 4 units
D
increased by 4 units
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

Which of the following series spectrum of hydrogen atom lies in ultraviolet region?

A
Paschen series
B
Brackett series
C
Pfund series
D
Lyman series
3
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

The wavelength of the second line of Balmer series is 486.4 nm. What is the wavelength of the first line of Lyman series?

A
78.8 nm
B
121.6 nm
C
418.2 nm
D
610.5 nm
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The Lyman series of a hydrogen atom belongs in which category

A
ultraviolet region
B
infrared region
C
visible region
D
None of these
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