1 |
Which electron traveled more distance, when jump from |
n1 to n2
n2 ato n3
n3 to n2
n3 to n4
|
2 |
If the electron in a hydrogen atom drops from n = 6 to n =4 level, the radiation emitted is in which series of lines in the spectrum of atomic hydrogen. |
Lyman
Balmer
Paschen
Brackett
|
3 |
As the quantum number n increases, the energy difference between adjacent energy level. |
Increase
Remain same
Decrease
No correlation
|
4 |
Lyman series lie in |
Ultraviolet region
Visible region
Infrared region
Radio waves region
|
5 |
Transition from various energy levels to the lowest energy level gives. |
Lyman series
Balmer series
Panchen sereis
Pfund series
|
6 |
The value of Rydberg constant is. |
1.6 x 10<sup>7</sup> m-1
1.9768 x 10<sup>7</sup> m-1
1.09678 x 10<sup>7</sup> m-1
1.7904 x 10<sup>7</sup> m-1
|
7 |
In which de excitation of electron of hydrogen atom maximum energy is relaeased. |
From n2 to n1
From n3 to n2
From na to n1
From na to n2
|
8 |
Energy and wavelength of a photon are related as. |
Direct
In direct
No correlation
Inverse under root
|
9 |
Which of the following wave properties is inversely proportional to the energy for electromagnetic radiations |
Frequency
Wave number
Velocity
Wave length
|
10 |
Which one of the following relationship is correct about energy and frequency. |
E = hv
E = h/v
E = v/h
h = v/E
|
11 |
The Rutherford experiment of using a stream of alpha particles on a piece of gold foil proved that. |
The atom was a solid sphere
The atom had electron
The atom had neutrons
The atom had a great empty space in it
|
12 |
Which is not decay product of free neutron |
Proton
Electron
Neutron
Antineutrino
|
13 |
Which one of the following has the same number of electrons as an alpha particle. |
H
He
H+
Li+
|
14 |
The mass of alpha particle is equal to. |
Four times the mass of one proton
That of one hydrogen atom
That of one electron
That of one proton
|
15 |
Cathode rays cast shadow when an opaque object is placed in their path. This behavior of cathode rays show that. |
They move is straight line
They are negatively charge
They possess momentum
They are energetic
|
16 |
Which gas has highest e/m ratio |
Hydrogen
Helium
Nitrogen
Oxygen
|
17 |
Which particle has a mass 1/1836 time, that of hydrogen. |
Proton
Positron
Electron
Neutron
|