Chapter No 1 :Structure of Atom (Classical Mechanics) (237 MCQ`S)

  1. Alpha particle scattering experiment results in the discovery of;
    1. neutron
    2. proton
    3. alpha particle
    4. nucleus
    5. Show Answer
      Answer: D
      Explanation:
      • N/A
  2. Who gave the concept of nuclear atom
    1. Neil Bohr
    2. Rutherford
    3. Max Planck
    4. J.J Thomson
    5. Show Answer
      Answer: B
      Explanation:
      • Since nucleus was discovered by Rutherford in 1909
  3. The thickness of Rutherford's gold foil was;
    1. 0.0004 cm
    2. 0.004 mm
    3. 0.00004 cm
    4. 0.0004 m
    5. Show Answer
      Answer: C
      Explanation:
      • N/A
  4. Almost all the mass of an atom is concentrated in;
    1. shells
    2. nucleus
    3. orbits
    4. all of these
    5. Show Answer
      Answer: B
      Explanation:
      • N/A
  5. In Rutherford's atomic model, most of the alpha particles passed straight through the gold foil because;
    1. alpha particles are heavier
    2. most of the space in an atom is empty
    3. alpha particles travel in a straight line
    4. alpha particles are positively charges
    5. Show Answer
      Answer: B
      Explanation:
      • N/A
  6. The scattering of alpha particles in Rutherford's atomic model showed that;
    1. alpha particles are positively charges
    2. nucelus is positively charged
    3. alpha particles are heavier particles
    4. nucleus is located at the centre of an atom
    5. Show Answer
      Answer: B
      Explanation:
      • N/A
  7. Rutherford's atomic model fails because;
    1. atom did not have a nucleus and electrons
    2. it did not account for the attraction between protons and neutrons
    3. it did not account for the stability of the atom
    4. there is actually no space between the nucleus and electrons
    5. Show Answer
      Answer: C
      Explanation:
      • N/A
  8. Rutherford's atomic model did not acount for the stability of an atom because;
    1. eletrons orbiting around the nucleus radiate energy continuously
    2. energy of the electron decreases and it will go into spiral motion
    3. electrons gradually collapse into the nucleus
    4. all of these
    5. Show Answer
      Answer: D
      Explanation:
      • N/A
  9. Rutherford's atomic model is similar to;
    1. Plum pudding model
    2. planetary system
    3. electrostatic system
    4. all of these
    5. Show Answer
      Answer: B
      Explanation:
      • N/A
  10. According to Rutherford's atomic model atoms must show;
    1. continuous spectrum
    2. line spectrum
    3. atomic emission spectrum
    4. all of these
    5. Show Answer
      Answer: A
      Explanation:
      • Since eletrons orbiting around the nucleus radiate energy continuously

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