1 |
When 6d orbital is complete, the entering electron goes into. |
7f
7s
7p
7d
|
2 |
An orbital which is spherical and symmetrical is |
S-Orbital
P - Orbital
d- Orbital
f - Orbital
|
3 |
Orbitals having same energy are called. |
Hybrid orbitals
Valance orbitals
Degenerate orbitals
d- orbitals
|
4 |
Maximum number of electrons in f-subshell is. |
2
6
10
14
|
5 |
The electron in a subshell is filled according to formula. |
2n<sup>2</sup>
2(2l+1)
(2l+1)
None of these
|
6 |
Quantum number values for 2p orbitals are. |
n = 2, 1 =1
n =1, 1 = 2
n =1, 1= 0
n = 2, 1 = 0
|
7 |
When atoms are subjected to strong electric field, splitting of spectral lines is called. |
Zeeman effect
stark effect
Photoelectric effect
Compton effect
|
8 |
The wave number of the light emitted by a certain source is 2 x 106m-1The wave length of this light is. |
500 nm
500 m
200 nm
600 m
|
9 |
Lyman series lies in spectral region |
Infrared
Ultra violet
Visible
None of these
|
10 |
The velocity of photon is. |
Depends on its source
Equal to square of its amplitude
Depends on its wavelength
Independent of its wavelength
|
11 |
In the ground state of an atom, the electrons is present. |
In the nucleus
In the second shell
Nearest to the nucleus
Farthest form the nucleus
|
12 |
Bohr's model of atom is contradicted b y. |
Planck quantum theory
Quantization of energy of electrons
Heisenberg's uncertainty principle
Quantization of angular momentum
|
13 |
Rutherford's model of atom failed because. |
The atom did not have a nucleus and electron
It did not account for the attraction between protons and neutrons.
It did not account for stability of the atom
There is actually no space between the nucleus and the electrons.
|
14 |
When fast neutron carries nuclear reaction with nitrogen it ejects aprticles. |
Alpha
Gamma
Beta
Nil
|
15 |
The e/m value for the positive rays in maximum for the gas. |
Helium
Oxygen
Nitrogen
Hydrogen
|
16 |
Positive rays were discovered by. |
J.J.Thomson
Goldstein
Ruther ford
William Crookes
|
17 |
The nature of positive rays depends on |
The nature of electrode.
The nature of discharge tube
The nature of residual gas
All of the above
|