No. of questions - 40
Time - 30 min
1.
Zeeman effect refers to the
2.
Which is not deflected by magnetic field:
3.
The photoelectric effect occurs only when the incident light has more frequency than a certain minimum:
4.
Energy of H-atom in the ground state is -13.6 eV, hence energy in the second excited state is
5.
Wave nature of electrons was demonstrated by
6.
An electron jumps from an outer orbit to an inner orbit with an energy difference of 3.0eV. What will be the wavelength of the line emitted?
7.
Bohr′s model violates the rules of classical physics because it assumes that:
8.
A hydrogen atom in its ground state absorbs a photon. The maximum energy of such a photon is:
9.
The maximum sum of the number of neutrons and proton is an isotope of hydrogen is :
10.
As electron moves away from the nucleus, its KE:
11.
Quantum theory was postulated by:
12.
Increase in the frequency of the incident radiations increases the:
13.
Photoelectric effect was discovered by :
14.
When the value of azimuthal quantum number is 3, magnetic quantum number can have values:
15.
As the number of orbit increase from the nucleus, the difference between the adjacent energy levels:
16.
Particle nature of electron was experimentally demonstrated by
17.
No two electrons can have the same values of …. quantum numbers.
19.
Potassium ion is isoelectronic with the atom of:
20.
Positive rays or canal rays are:
22.
The uncertainty principle and the concept of wave nature of matter was proposed by … and … respectively
23.
The characteristic not associated with Planck’s theory is
24.
A hydrogen atom in its ground state absorbs a photon. The maximum energy of such a photon is:
27.
When light is directed at the metal surface, the emitted electrons:
28.
The electron possesses wave properties was shown experimentally by:
29.
In Bohr’s series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inner-orbit jumps of the electron for Bohr orbit in an atom of hydrogen?
30.
X-rays do not show the phenomenon of :
31.
The principal quantum number of H-atom orbital, if the electron energy is −3.4 eV, will be
32.
The nucleus of an atom contains
34.
A quanta will have more energy, if :
35.
What is the ration of mass of an electron to the mass of a proton?
36.
Cathode-ray tube is used in:
37.
Energy of photon of visible light is
38.
The nature of canal rays depends on:
39.
The number of vacant orbitals of element with atomic number 14 is:
40.
A gas absorbs photon of 355 nm and emits at two wavelengths. If one of the emission is at 680 nm, the other is at
