The de-Broglie wavelength of an electron in the first Bohr orbit is
(a) Equal to one fourth the circumference of the first orbit
(b) Equal to half the circumference of the first orbit
(c) Equal to twice the circumference of the first orbit
(d) Equal to the circumference of the first orbit

Concept Questions :-

Bohr's model of atom
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The frequency of 1st line of Balmer series in ${\mathrm{H}}_{2}$ atom is ${\mathrm{v}}_{0}$. The frequency of line emitted by singly ionised He atom is

(a) 2${\mathrm{v}}_{0}$           (b) 4${\mathrm{v}}_{0}$
(c) ${\mathrm{v}}_{0}$/2          (d) ${\mathrm{v}}_{0}$/4

Concept Questions :-

Spectral series
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

When the electron in the hydrogen atom jumps from 2nd orbit to 1st orbit, the wavelength of radiation emitted is $\mathrm{\lambda }$. When the electrons jump from 3rd orbit to 1st orbit, the wavelength of emitted radiation would be
(a) $\frac{27}{32}\mathrm{\lambda }$             (b) $\frac{32}{27}\mathrm{\lambda }$
(c) $\frac{2}{3}\mathrm{\lambda }$               (d) $\frac{3}{2}\mathrm{\lambda }$

Concept Questions :-

Spectral series
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Which of the following transition will have shortest emission wavelength ?
(a) n = 2 to n =1           (b) n = 1 to n = 2
(c) n = 2 to n = 5          (d) n = 5 to n = 2

Concept Questions :-

Spectral series
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

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
To view Explanation, Please buy any of the course from below.
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
To view Explanation, Please buy any of the course from below.
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
To view Explanation, Please buy any of the course from below.
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
To view Explanation, Please buy any of the course from below.
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
To view Explanation, Please buy any of the course from below.
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
Please attempt this question first.

Difficulty Level: