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