No. of questions - 40
Time - 30 min
1.
A hydrogen atom in its ground state absorbs a photon. The maximum energy of such a photon is:
2.
A quanta will have more energy, if :
3.
Energy of photon of visible light is
4.
The nature of canal rays depends on:
5.
Potassium ion is isoelectronic with the atom of:
6.
The photoelectric effect occurs only when the incident light has more frequency than a certain minimum:
7.
Zeeman effect refers to the
8.
The number of vacant orbitals of element with atomic number 14 is:
9.
The electron possesses wave properties was shown experimentally by:
10.
Wave nature of electrons was demonstrated by
11.
Positive rays or canal rays are:
12.
Bohr′s model violates the rules of classical physics because it assumes that:
13.
Quantum theory was postulated by:
14.
Photoelectric effect was discovered by :
16.
The nucleus of an atom contains
17.
When light is directed at the metal surface, the emitted electrons:
18.
X-rays do not show the phenomenon of :
20.
As electron moves away from the nucleus, its KE:
22.
When the value of azimuthal quantum number is 3, magnetic quantum number can have values:
24.
Energy of H-atom in the ground state is -13.6 eV, hence energy in the second excited state is
25.
The maximum sum of the number of neutrons and proton is an isotope of hydrogen is :
26.
The characteristic not associated with Planck’s theory is
27.
A hydrogen atom in its ground state absorbs a photon. The maximum energy of such a photon is:
28.
The uncertainty principle and the concept of wave nature of matter was proposed by … and … respectively
29.
The principal quantum number of H-atom orbital, if the electron energy is −3.4 eV, will be
30.
No two electrons can have the same values of …. quantum numbers.
31.
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
32.
As the number of orbit increase from the nucleus, the difference between the adjacent energy levels:
33.
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?
34.
Increase in the frequency of the incident radiations increases the:
35.
Which is not deflected by magnetic field:
36.
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?
37.
What is the ration of mass of an electron to the mass of a proton?
38.
Particle nature of electron was experimentally demonstrated by
40.
Cathode-ray tube is used in:
