Atoms and Nuclei Test

Result

Atoms and Nuclei Test - 106

Score
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Rank
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Weekly Quiz Competition

Question 1
4 / -1

The ground state energy of hydrogen atom is –13.6 eV. What is the potential energy of the electron in this state?

A
0 eV

B
–27.2 eV

C
1 eV

D
2 eV

Solution
Question 2
4 / -1

The magnetic moment (µ) of a revolving electron around the nucleus varies with principal quantum number n as

A

B

C

D
Question 3
4 / -1

An electron with kinetic energy 5 eV is incident on a H–atom in its ground state. The collision

A
Must be elastic

B
May be partially elastic

C
Must be completely elastic

D
May be completely inelastic

Solution
Question 4
4 / -1

The radius of an electron orbit in a hydrogen atom is of the order of

A
10^–8 m

B
10^–9 m

C
10^–11 m

D
10^–13 m

Solution
Question 5
4 / -1

If electron in a hydrogen atom has moved from n = 1 to n = 10 orbit, the potential energy of the system has

A
Increased

B
Decreased

C
Remained unchanged

D
Become zero

Solution
Question 6
4 / -1

The wavelength of the first line of Lyman series for hydrogen atom is equal to that of the second line of Balmer series for a hydrogen like ion. The atomic number Z of hydrogen like ion is

A
2

B
3

C
4

D
1

Solution
Question 7
4 / -1

Out of the following which one is not a possible energy for a photon to be emitted by hydrogen atom according to Bohr\'s atomic model

A
13.6 eV

B
0.65 eV

C
1.9 eV

D
11.1 eV

Solution
Question 8
4 / -1

Electron in hydrogen atom first jumps from third excited state to second excited state and then from second excited to the first excited state. The ratio of the wavelengths λ₁ :λ₂emitted in the two cases is

A
7/5

B
27/20

C
27/5

D
20/7

Solution
Question 9
4 / -1

Which of the following particles are constituents of the nucleus

A
Protons and electrons

B
Protons and neutrons

C
Neutrons and electrons

D
Neutrons and positrons
Question 10
4 / -1

The neutron was discovered by

A
Marie Curie

B
Pierre Curie

C
James Chadwick

D
Rutherford