12th Class Physics Atomic Physics Question Bank

done Assertion And Reason (MCQs) - Atoms Total Questions - 4

• question_answer1)

  Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

  Assertion (A): Bohr postulated that the electrons in stationary orbits around the nucleus do not radiate.

  Reason (R): According to classical Physics, all moving electrons radiate.

   
  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is true done clear
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• question_answer2)

  Assertion (A): According to Rutherford, atomic model, the path of electron is parabolic.

  Reason (R): Rutherford could not explain the stability of atom.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is true done clear
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• question_answer3)

  Assertion (A): In the a-particle scattering experiment, most of the a-particles pass undeviated.

  Reason (R): Most of the space in the atom is empty.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is true done clear
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• question_answer4)

  Assertion (A): Bohr model is not applicable for multi-electron model.

  Reason (R): Bohr model cannot account for sublevel (s, p, d, f) orbitals and electron spin.

   
  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true but R is NOT the correct explanation of A done clear
  C)
  A is true but R is false done clear
  D)
  A is false and R is true done clear
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