Mashaal Masha
Mashaal Masha
 Oct 16, 2022
0
Choose the correct options for the following questions.
The first series which was identified in the spectrum of hydrogen is called:
Difficulty: Easy
A:
Lyman series
B:
Balmer seris
C:
Paschen series
D:
Brackett series
Balmer series was identified in:
Difficulty: Easy
A:
1685
B:
1785
C:
1885
D:
1985
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Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is:
Difficulty: Easy
A:
Less than atmospheric pressure
B:
Much less than atmospheric pressure
C:
Greater than atmospheric pressure
D:
Much greater than atmospheric pressure
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Difficulty: Easy
A:
Visible region
B:
Invisible region
C:
Infra-red region
D:
Ultraviolet region
The natural arrangement of colors in the spectrum of white light spectrum is:
Difficulty: Easy
A:
VIBGYOR
B:
ROYBGIV
C:
ROYBIGV
D:
BIGROYV
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The range of wavelength of colors in the visible colors is:
Difficulty: Easy
A:
410 nm to 456 nm
B:
10 nm to 56 nm
C:
410 nm to 656 nm
D:
910 nm to 956 nm
Tick the incorrect statement:
Difficulty: Easy
A:
$R_{H}=1.097 \times 10^{7} m^{-1}$
B:
$h=6.62 \times 10^{-34} Js$
C:
$\lambda_{red}=656 nm$
D:
$\lambda_{violet}=700 nm$
The results of spectra obtained by Blamer were expressed in 1896 by:
Difficulty: Easy
A:
Bohr
B:
Rydberg
C:
Planck
D:
Rutherford
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The process of formation of spectrum is called:
Difficulty: Easy
A:
Interference
B:
Spectroscopy
C:
Dispersion
D:
Reflection
The value of Rydberg's constant is:
Difficulty: Easy
A:
$1.0974 \times 10^{-7} m^{-1}$
B:
$1.0974 \times 10^{7} m^{-1}$
C:
$1.0974 \times 10^{4} cm^{-1}$
D:
$1.0974 \times 10^{10} cm^{-1}$

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