Atoms and Nuclei Test

Result

Atoms and Nuclei Test - 82

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Weekly Quiz Competition

Question 1
4 / -1

Energy of an electron in n^th orbit of hydrogen atom is

A

B

C

D
Question 2
4 / -1

The diagram shows the energy levels for an electron in a certain atom. Which transition shown represents the emission of a photon with the most energy ?

A
I

B
II

C
III

D
IV

Solution
Question 3
4 / -1

As the electron in Bohr orbit of Hydrogen atom passes from state n = 2 to n = 1, the kinetic energy K and potential energy U change as

A
K two- fold, U four-fold

B
K four-fold, U two-fold

C
K four-fold, U also four-fold

D
K two-fold, U also two-fold

Solution
Question 4
4 / -1

Bohr\'s atom model assumes

A
The nucleus is of infinite mass and is at rest

B
Electrons in a quantized orbit will not radiate energy

C
Mass of electron remains constant

D
All the above conditions
Question 5
4 / -1

In Raman effect, Stoke\'s lines are spectral lines having

A
Frequency greater than that of the original line

B
Wavelength equal to that of the original line

C
Wavelength less than that of the original line

D
Wavelength greater than that of the original line
Question 6
4 / -1

Two protons are kept at a separation of 40 Å. F_n is the nuclear force and F_e is the electrostatic force between them. Then

A
F_n << F_e

B
F_n ≈ F_e

C
F_n >> F_e

D
F_n = F_e

Solution
Question 7
4 / -1

Which of the following transition in Balmer series for hydrogen atom will have longest wavelength?

A
n = 2 to n = 1

B
n = 6 to n = 1

C
n = 3 to n = 2

D
n = 6 to n = 2

Solution
Question 8
4 / -1

v₁ is the frequency of the series limit of Lyman series, v₂ is the frequency of the first line of Lyman series and v₃ is the frequency of the series limit of the Balmer series. Then

A

B

C

D

Solution
Question 9
4 / -1

Two energy levels of an electron in an atom are separated by 2.3 eV. The frequency of radiation emitted when the electrons goes from higher to the lower level is

A
6.95 × 10¹⁴ Hz

B
3.68 × 10¹⁵ Hz

C
5.6 × 10¹⁴ Hz

D
9.11 × 10¹⁵ Hz

Solution
Question 10
4 / -1

A diatomic molecule is made of two masses m₁ and m₂ which are separated by a distance r. If we calculate its rotational energy by applying Bohr\'s rule of angular momentum quantization, its energy will be given by (n is an integer)

A

B

C

D

Solution