If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy required to remove the electron from the first excited state of ${\mathrm{Li}}^{++}$ is
(a) 122.4 eV        (b) 30.6 eV
(c) 13.6 eV          (d) 3.4 eV

Concept Questions :-

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

Difficulty Level:

Which state of triply ionised Beryllium $\left({\mathrm{Be}}^{+++}\right)$ has the same orbital radius as that of the ground state of hydrogen

(a) n = 4                  (b) n = 3
(c) n = 2                  (d) n = 1

Concept Questions :-

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

Difficulty Level:

The ratio of areas within the electron orbits for the first excited state to the ground state for hydrogen atom is

1. 16 : 1             2. 18 : 1
3. 4 : 1               4. 2 : 1

Concept Questions :-

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

Difficulty Level:

Taking Rydberg’s constant  first and second wavelength of Balmer series in hydrogen spectrum is

(a) 2000 Å, 3000 Å                  (b) 1575 Å, 2960 Å
(c) 6529 Å, 4280 Å                  (d) 6552 Å, 4863 Å

Concept Questions :-

Spectral series
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The kinetic energy of electron in the first Bohr orbit of the hydrogen atom is
(a) – 6.5 eV               (b) – 27.2 eV
(c) 13.6 eV                (d) – 13.6 eV

Concept Questions :-

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

Difficulty Level:

In Bohr’s model of hydrogen atom, which of the following pairs of quantities are quantized
(a) Energy and linear momentum
(b) Linear and angular momentum
(c) Energy and angular momentum
(d) None of the above

Concept Questions :-

Bohr's model of atom

Difficulty Level:

The energy of the highest energy photon of Balmer series of hydrogen spectrum is close to
(a) 13.6 eV              (b) 3.4 eV
(c) 1.5 eV                (d) 0.85 eV

Concept Questions :-

Spectral series
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Which one of the relation is correct between time period and number of orbits while an electron is revolving in a orbit

(a) ${\mathrm{n}}^{2}$              (b) $\frac{1}{{\mathrm{n}}^{2}}$
(c) ${\mathrm{n}}^{3}$              (d) $\frac{1}{\mathrm{n}}$

Concept Questions :-

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

Difficulty Level:

An electron changes its position from orbit n = 4 to the orbit n = 2 of an atom. The wavelength of the emitted radiation’s is (R = Rydberg’s constant)
(a) $\frac{16}{\mathrm{R}}$              (b) $\frac{16}{3\mathrm{R}}$
(c) $\frac{16}{5\mathrm{R}}$              (d) $\frac{16}{7\mathrm{R}}$

Concept Questions :-

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

Difficulty Level:

If the energy of a hydrogen atom in nth orbit is ${\mathrm{E}}_{\mathrm{n}}$, then energy in the nth orbit of a singly ionized helium atom will be
(a) 4${\mathrm{E}}_{\mathrm{n}}$             (b) ${\mathrm{E}}_{\mathrm{n}}$/4
(c) 2${\mathrm{E}}_{\mathrm{n}}$              (d) ${\mathrm{E}}_{\mathrm{n}}$/2

Concept Questions :-

Bohr's model of atom