Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Atoms and Nuclei question

2024 · 29 Jan · Shift 2 · Q78
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Atoms and Nuclei
  5. /2024 · 29 Jan · Shift 2 · Q78

Atoms and Nuclei question

2024 · 29 Jan · Shift 2 · Q78

JEE MainPhysicsAtoms and NucleiMCQ+4 / −1
Given below are two statements: Statement I : Most of the mass of the atom and all its positive charge are concentrated in a tiny nucleus and the electrons revolve around it, is Rutherford's model. Statement II : An atom is a spherical cloud of positive charges with electrons embedded in it, is a special case of Rutherford's model. In the light of the above statements, choose the most appropriate from the options given below
  1. A
    Both Statement I and Statement II are true
  2. B
    Statement I is true but Statement II is false
  3. C
    Statement I is false but Statement II is true
  4. D
    Both statement I and statement II are false
View written solutionFree

Correct answer: B

  1. Analyze Statement I

    Statement I says:

    Most of the mass of the atom and all its positive charge are concentrated in a tiny nucleus and the electrons revolve around it.

    This is exactly Rutherford’s nuclear model of atom.

    • Positive charge is concentrated at the center.
    • Nearly all the mass is concentrated in the nucleus.
    • Electrons revolve around the nucleus.

    Therefore, Statement I is true.

  2. Analyze Statement II

    Statement II says:

    An atom is a spherical cloud of positive charges with electrons embedded in it, is a special case of Rutherford's model.

    This description is actually J.J. Thomson’s plum pudding model, not Rutherford’s model.

    • In Thomson’s model, positive charge is spread uniformly throughout the atom.
    • Electrons are embedded in this positive sphere.
    • There is no nucleus in this model.

    Hence it is not a special case of Rutherford’s model.

    Therefore, Statement II is false.

  3. Choose the correct option

    • Statement I: True
    • Statement II: False

    So the correct option is: B\boxed{\text{B}}B​

  4. Comparison with stored answer

    Stored correct answer: B

    My derived answer: B

    They match.

PreviousNext

More from Atoms and Nuclei

  • Hydrogen atom is bombarded with electrons accelerated through a potential difference of V, which causes excitation of hydrogen atoms. If the experiment is being performed at T=0 K, the minimum potential…2024 · Numerical
  • The ratio of the magnitude of the kinetic energy to the potential energy of an electron in the 5th excited state of a hydrogen atom is :2024 · MCQ
  • A electron of hydrogen atom on an excited state is having energy En​=−0.85 eV. The maximum number of allowed transitions to lower energy level is ​.2024 · Numerical
  • An electron revolving in nth  Bohr orbit has magnetic moment μn​. If μn​∝nx, the value of x is2024 · MCQ
  • In a nuclear fission reaction of an isotope of mass M, three similar daughter nuclei of same mass are formed. The speed of a daughter nuclei in terms of mass defect ΔM will be :2024 · MCQ
  • If the wavelength of the first member of Lyman series of hydrogen is λ. The wavelength of the second member will be2024 · MCQ
  • The mass defect in a particular reaction is 0.4 g. The amount of energy liberated is n×107 kWh, where n=​. (speed of light =3×108 m/s)2024 · Numerical
  • The mass number of nucleus having radius equal to half of the radius of nucleus with mass number 192 is :2024 · MCQ