हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

The Bohr model for the spectra of a H-atom ______. will not be applicable to hydrogen in the molecular from. will not be applicable as it is for a He-atom. is valid only at room temperature.

Advertisements
Advertisements

प्रश्न

The Bohr model for the spectra of a H-atom ______.

  1. will not be applicable to hydrogen in the molecular from.
  2. will not be applicable as it is for a He-atom.
  3. is valid only at room temperature.
  4. predicts continuous as well as discrete spectral lines.

विकल्प

  • a and b

  • c and d

  • b and c

  • a and d

MCQ
रिक्त स्थान भरें
Advertisements

उत्तर

a and b

Explanation:

Bohr proposed a model for the hydrogen atom which is also applicable for some lighter atoms in which a single electron revolves around a stationary nucleus of positive charge Ze (called a hydrogen-like atom, e.g.: H, He+, Li+2, Na+1 etc). It is not applicable to hydrogen in the molecular form and also, it will not be applicable as it is for a He-atom.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 12: Atoms - Exercises [पृष्ठ ७७]

APPEARS IN

एनसीईआरटी एक्झांप्लर Physics Exemplar [English] Class 12
अध्याय 12 Atoms
Exercises | Q 12.10 | पृष्ठ ७७

वीडियो ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्न

The ratio of kinetic energy of an electron in Bohr’s orbit to its total energy in the same orbit  is

(A) – 1

(B) 2

(C) 1/2

(D) – 0.5


State Bohr postulate of hydrogen atom that gives the relationship for the frequency of emitted photon in a transition.


Using Bohr’s postulates, obtain the expression for total energy of the electron in the nth orbit of hydrogen atom.


Suppose, the electron in a hydrogen atom makes transition from n = 3 to n = 2 in 10−8 s. The order of the torque acting on the electron in this period, using the relation between torque and angular momentum as discussed in the chapter on rotational mechanics is


A neutron having kinetic energy 12.5 eV collides with a hydrogen atom at rest. Nelgect the difference in mass between the neutron and the hydrogen atom and assume that the neutron does not leave its line of motion. Find the possible kinetic energies of the neutron after the event.


According to Bohr, 'Angular momentum of an orbiting electron is quantized'. What is meant by this statement?


According to Bohr's theory, an electron can move only in those orbits for which its angular momentum is integral multiple of ____________.


According to Bohr's model of hydrogen atom, an electron can revolve round a proton indefinitely, if its path is ______.


Using Bohr's postulates derive the expression for the radius of nth orbit of the electron.


The ratio of the ionization energy of H and Be+3 is ______.


The mass of a H-atom is less than the sum of the masses of a proton and electron. Why is this?


How will the energy of a hydrogen atom change if n increases from 1 to ∞?


The wavelength in Å of the photon that is emitted when an electron in Bohr orbit with n = 2 returns to orbit with n = 1 in H atom is ______ Å. The ionisation potential of the ground state of the H-atom is 2.17 × 10−11 erg.


A hydrogen atom in its first excited state absorbs a photon of energy x × 10-2 eV and exited to a higher energy state where the potential energy of electron is -1.08 eV. The value of x is ______.


The energy required to remove the electron from a singly ionized Helium atom is 2.2 times the energy required to remove an electron from Helium atom. The total energy required to ionize the Helium atom completely is ______. 


What is the energy associated with first orbit of Li2+ (RH = 2.18 × 10-18)?


In Bohr's theory of hydrogen atom, the electron jumps from higher orbit n to lower orbit p. The wavelength will be minimum for the transition ______.


Oxygen is 16 times heavier than hydrogen. Equal volumes of hydrogen and oxygen are mixed. The ratio of speed of sound in the mixture to that in hydrogen is ______.


Hydrogen atom from excited state comes to the ground state by emitting a photon of wavelength λ. If R is the Rydberg constant then the principal quantum number n of the excited state is ______.


What is the velocity of an electron in the 3rd orbit of hydrogen atom if its velocity in the 1st orbit is v0?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×