Select Chapter Topics: The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom is:

1. 1 : 1

2. 1 : -1

3. 2 : -1

4. 1 : -2  Subtopic:  Bohr's Model of Atom |
77%
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NEET - 2018
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The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is:
1. $$1$$
2. $$4$$
3. $$0.5$$
4. $$2$$  Subtopic:  Spectral Series |
74%
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NEET - 2017
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If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength $\lambda$. When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be:

1.  $\frac{16}{25}\mathrm{\lambda }$

2.  $\frac{9}{16}\mathrm{\lambda }$

3.  $\frac{20}{7}\mathrm{\lambda }$

4.  $\frac{20}{13}\mathrm{\lambda }$  Subtopic:  Bohr's Model of Atom |
78%
From NCERT
NEET - 2016
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Given that the value of the Rydberg constant is 107 m-1, what will be the wave number of the last line of the Balmer series in the hydrogen spectrum?
1. $$0.5 \times 10^{7} ~m^{-1}$$
2. $$0.25 \times 10^{7} \mathrm{~m}^{-1}$$
3. $$2.5 \times 10^{7} \mathrm{~m}^{-1}$$
4. $$0.025 \times 10^{4} ~m^{-1}$$  Subtopic:  Spectral Series |
85%
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NEET - 2016
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When an $$\alpha$$-particle of mass $$m$$ moving with velocity $$v$$ bombards on a heavy nucleus of charge $$Ze$$, its distance of closest approach from the nucleus depends on $$m$$ as:
1. $$\frac{1}{\sqrt{m}}$$
2. $$\frac{1}{m^{2}}$$
3. $$m$$
4. $$\frac{1}{m}$$  Subtopic:  Various Atomic Models |
73%
From NCERT
NEET - 2016
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