Download App

Structure of the Atom — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
The Bohr model of atoms:
  • A
    Uses Einstein's photo electric equation
  • B
    Predicts continuous emission spectra for atoms
  • C
    Predicts the same emission spectra for all types of atoms
  • D
    Assumes that the angular momentum of electrons is quantized
✓

Answer

  1. Assumes that the angular momentum of electrons is quantized

Explanation:

Bohr model of an atom states that only those orbits are allowed where angular momentum of electron are integral multiple of $\frac{\text{nh}}{2\pi}$ These orbits have quantized energy and angular momentum associated with electron.

The model can be applied to hydrogen or hydrogen-like atoms to explain their line emission spectrum.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q-[Che-1M]" from Structure of the Atom→Structure of the Atom — all question types→Science STD 9 question papers→CBSE Board STD 9 question papers→CBSE Board question paper generator→

Similar questions

To separate ammonium chloride from common salt, we use:
→
Which one of the following set of phenomena would increase on raising the temperature?
  1. Diffusion, evaporation, compression of gases.
  2. Evaporation, compression of gases, solubility.
  3. Evaporation, diffusion, expansion of gases.
  4. Evaporation, solubility, diffusion, compression of gases.
→
A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents the correct arrangement?
  1. Water, air, wind.
  2. Air, sugar, oil.
  3. Oxygen, water, sugar.
  4. Salt, juice, air.
→
Atom : .................... : : Electrons : Negatively charged:
→
Liquid-liquid mixtures can be seperated by:
→
Evaporation of water will be faster:
→
Which of the following contains maximum number of molecules?
→
All matter that is present in the universe has:
→
Evaporation that occurs directly from the solid phase below the melting point is called as:
→
Goldstein’s experiments which involved passing high voltage electricity through gases at very low pressure resulted in the discovery of:
  1. Electron.
  2. Proton.
  3. Nucleus.
  4. Neutron.
→