Atoms and Nuclei Test

Result

Atoms and Nuclei Test - 41

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Weekly Quiz Competition

Question 1
4 / -1

Ratio of the wavelengths of first line of Lyman series and first line of Balmer series is

A
1 : 3

B
27 : 5

C
5 : 27

D
4 : 9

Solution
Question 2
4 / -1

The wavelength of the first line of Balmer series is 6563 Å. The Rydberg constant for hydrogen is about

A

B

C

D

Solution
Question 3
4 / -1

According to Bohr\'s theory the moment of momentum of an electron revolving in second orbit of hydrogen atom will be

A
2πh

B
πh

C

D

Solution
Question 4
4 / -1

The velocity of an electron in the second orbit of sodium atom (atomic number = 11) is v. The velocity of an electron in its fifth orbit will be

A
v

B

C

D

Solution
Question 5
4 / -1

The absorption transitions between the first and the fourth energy states of hydrogen atom are 3. The emission transitions between these states will be

A
3

B
4

C
5

D
6

Solution
Question 6
4 / -1

The ratio of longest wavelength and the shortest wavelength observed in the five spectral series of emission spectrum of hydrogen is

A

B

C
25

D

Solution
Question 7
4 / -1

As per Bohr model, the minimum energy (in eV) required to remove an electron from the ground state of doubly ionized Li atom (Z = 3) is

A
1.51

B
13.6

C
40.8

D
122.4

Solution
Question 8
4 / -1

Which of these is non-divisible?

A
Nucleus

B
Photon

C
Proton

D
Atom
Question 9
4 / -1

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

Solution
Question 10
4 / -1

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