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Class 11 Chemistry: Structure of Atom
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MCQs on subatomic particles discovery, atomic models, bohr’s model developments, bohr’s and quantum mechanical model of atom.

Class 11 Chemistry: Structure of Atom
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25 Questions

1. How many electrons can exist with the principal quantum number’s value as 4?
2. Which of the following models are not the same as Thomson Model of Atom?
3. Elements do emit radiation on their own and this property is known as _____
4. A ball of mass 0.5kg is moving with velocity 6.626 m/s. What’s the wavelength of that ball?
5. Which of the following may be an incorrect statement regarding cathode ray discharge tube?
6. When cathode rays strike zinc sulfide coating, what did it create?
7. ________ frequency, is the minimum frequency required to eject an electron when photons hit the metal surface.
8. As per Heisenberg’s principle of uncertainty, the relation between relative momentum and relative position is __________
9. What is the ratio of the atomic radius of the 5th orbit in chlorine atom and 3rd orbit in Helium atom?
10. When an electron jumps from 3rd orbit to 2nd orbit, which series of spectral lines are obtained?
11. The below process of filling electrons in an orbital follows __________
Find the filling electrons in an orbital from the given diagramFind the filling electrons in an orbital from the given diagram
12. Iω = _________
13. What’s the mass of neutron in terms of electrons mass?
14. The uncertainty of a ball is given by 0.5A°. Then calculate the uncertainty in momentum.
15. Pick out the isobar of 18Ar40.
16. Mass of a photon is given by 3.313 x 10-34 kg. Find it’s wavelength.
17. An object has a mass of 6 kg and velocity of 10 m/s. The speed is measured with 5% accuracy, then find out Δx in m.
18. Who did the oil drop experiment?
19. The below model of organization of electrons in atom is given by ___________
Find organization of electrons in atom from the given diagram
20. Which of the following statements you think is wrong regarding α particle scattering effect?
21. What is the wavenumber of violet color?
22. According to the Aufbau’s principle, which of the following orbital should be filled first?
23. Write the values for l, n, and m for Ψ3,1,0?
24. A metal’s work function is 3.8KJ. Photons strike metal’s surface with an energy of 5.2 KJ. what’s the kinetic energy of the emitted electrons?
25. If the kinetic energy of an electron is 5J. Find out its wavelength.

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