In Bohr's model of hydrogen atom, let PE represents potential energy and TE the total energy. In going to a higher level

(a) PE decreases, TE increases

(b) PE increases, TE increases

(c) PE decreases, TE decreases

(d) PE increases, TE decreases

Concept Questions :-

Bohr's model of atom
High Yielding Test Series + Question Bank - NEET 2020

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According to Bohr's model, the radius of the second orbit of helium atom is
(a) 0.53 Å             (b) 1.06 Å
(c) 2.12 Å             (d) 0.265 Å

Concept Questions :-

Bohr's model of atom
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The fact that photons carry energy was established by

(a) Doppler's effect               (b) Compton's effect
(c) Bohr's theory                   (d) Diffraction of light

Concept Questions :-

Bohr's model of atom

Difficulty Level:

An ionic atom equivalent to hydrogen atom has wavelength equal to 1/4 of the wavelengths of hydrogen lines. The ion will be
(a) ${\mathrm{He}}^{+}$         (b) ${\mathrm{Li}}^{++}$
(c) ${\mathrm{Ne}}^{9+}$        (d) ${\mathrm{Na}}^{10+}$

Concept Questions :-

Spectral series
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The third line of Balmer series of an ion equivalent to hydrogen atom has wavelength of 108.5 nm. The ground state energy of an electron of this ion will be
(a) 3.4 eV                (b) 13.6 eV
(c) 54.4 eV              (d) 122.4 eV

Concept Questions :-

Spectral series
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Difficulty Level:

An electron in the n = 1 orbit of hydrogen atom is bound by 13.6 eV energy is required to ionize it is
(a) 13.6 eV                    (b) 6.53 eV
(c) 5.4 eV                      (d) 1.51 eV

Concept Questions :-

Various atomic model
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Hydrogen atom emits blue light when it changes from n = 4 energy level to the n = 2 level. Which colour of light would the atom emit when it changes from the n = 5 level to the n = 2 level
(a) Red                   (b) Yellow
(c) Green                (d) Violet

Concept Questions :-

Spectral series
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The first line of Balmer series has wavelength 6563 Å. What will be the wavelength of the first member of Lyman series

(a) 1215.4 Å             (b) 2500 Å
(c) 7500 Å                (d) 600 Å

Concept Questions :-

Spectral series
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Difficulty Level:

In Bohr's model, the atomic radius of the first orbit is ${\mathrm{r}}_{0}$, then the radius of the third orbit is
(a) $\frac{{\mathrm{r}}_{0}}{9}$               (b) ${\mathrm{r}}_{0}$
(c) $9{\mathrm{r}}_{0}$               (d) $3{\mathrm{r}}_{0}$

Concept Questions :-

Bohr's model of atom
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The wavelength of the energy emitted when electron come from fourth orbit to second orbit in hydrogen is 20.397 cm. The wavelength of energy for the same transition in ${\mathrm{He}}^{+}$ is

(a) 5.099 ${\mathrm{cm}}^{-1}$             (b) 20.497 ${\mathrm{cm}}^{-1}$
(c) 40.994 ${\mathrm{cm}}^{-1}$            (d) 81.988 ${\mathrm{cm}}^{-1}$

Concept Questions :-

Bohr's model of atom