CBSE Class 11 Chemistry MCQs - Structure of Atom

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CBSE Class 11 Chemistry MCQs - Structure of Atom CBSE and NCERT students can refer to the attached file. All educational material on the website has been prepared by the best teachers having more than 20 years of teaching experience in various schools. The study material available on our website for all CBSE classes and subjects have been prepared by teachers from all over the country. All study material has been carefully designed keeping into mind the latest CBSE examination trends.  

Structure of Atom

I. MCQ - Choose Appropriate Alternative

1. The charge on an electron is __________.

(-2.46 x 104 coulombs, -1.6 x 10-19 coulombs, 1.6 x 10-9coulombs)

2. The maximum number of electrons that can accommodated by a p-orbital is __________. (2, 6, 10)

3. A proton is __________. (a helium ion, a positively charged particle of mass 1.67 x 10-27 kg, a positively charged particle of mass 1/1837 that of Hydrogen atom)

4. Most penetrating radiation of a radioactive element is __________(a-rays, b-rays, g-rays)

5. The fundamental particles of an atom are __________. (Electrons and protons, electrons and neutrons, Electrons, Protons, Neutrons)

6. The fundamental particles of an atoms are __________. (the number of protons, The number of neutrons, The sum of protons and neutrons)

7. “No two electrons in the same atoms can have identical set of four quantum numbers.” This statement is known as __________. (Pauli’s Exclusion Principle, Hund’s rule, Aufbau Rule)

8. __________ has the highest electronegativity value. (Fluorine, Chlorine, Bromine)

9. Principle Quantum number describes __________. (Shape of orbital , size of the orbital, Spin of electron in the orbital)

10. Canal rays are produced from __________. (Anode, Cathode, Ionization of gas in the discharge tube)

11. Electromagnetic radiation produce from nuclear reactions are known as __________. (a-rays, b-rays, g-rays)

12. Cathode rays consist of __________. (Electorns, Protons, Positrons)

13. The properties of cathode rays __________ upon the nature of the gas inside the tube. (depend, partially depend, do not depend)

14. Anode rays consists of __________ particles. (Negative, Positive, Neutral)

15. Atomic mass of an element is equal to the sum of __________. (electrons and protons, protons and neutrons, electrons and neutrons)

16. Neutrons were discovered by __________. (Faraday, Dalton, Chadwick)

17. The value of Plank’s constant is __________. (6.626 x 10-34, 6.023 x 1024, 1.667 x 10-28)

18. P-orbitals are __________ in shape. (spherical, diagonal, dumb bell)

19. The removal of an electron from an atom in gaseous state is called __________. (Ionization energy, Electron Affinity, Electronegativity)

20. The energy released when an electron is added to an atom in the gaseous state is called __________. (Ionization Potential, electron Affinity, Electronegativity)

21. The power of an atom to attract a shared pair of electrons is called __________. (Ionization Potential, Electron Affinity, Electronegativity)

22. Electronegativity of Fluorine is arbitrarily fixed as __________. (2, 3, 4)

23. The energy difference between the shells go on __________ when moved away from the nucleus. (Increasing, decreasing, equalizing)

24. __________ discovered that the nucleus of an atom is positively charged. (William Crooke’s, Rutherford, Dalton)

25. Isotopes are atoms having same __________ but different __________. (Atomic weight, Atomic number, Avogadro’s Number)

26. __________ consists of Helium Nuclei or Helium ion (He++).

27. The angular momentum of an electron revolving around the nucleus of atom is __________. (nh/2p, n2h2/2p, nh3/3p)

28. The wavelengths of X-rays are mathematically related to the __________ of anticathode element. (atomic weight, atomic number, Avogadro’s number)

29. Lyman Series of spectral lines appear in the __________ portion of spectrum. (Ultraviolet, Infra red, Visible)

30. According to __________ electrons are always filled in order of increasing energy. (Pauli’s Exclusion Principle, Uncertainty Principle, Aufbau Principle)

II. Fill in the Blank

1. The maximum number of electrons in 2p orbital is __________.

2. 3d orbital has __________ energy than 4s orbital.

3. __________ rays are non-material in nature.

4. Charge to mass ratio of cathode rays resembles to that of __________.

5. __________ rays are most penetrating.

6. Neutrons have mass equal to that of __________.

7. Energy is __________ when an electron jumps from higher to lower orbit.

8. Second Ionization Potential has __________ value than the First Ionization Potential.

9. Electronegativity __________ from left to right in a period of Periodic Table.

10. __________ was discovered during the course of Artificial Radioactivity.

11. The velocity of alpha rays is nearly __________ of velocity of light.

12. Natural Radioactivity is confined in __________ elements.

13. The isotopes of an element differ in their __________.

14. Two electrons with the __________ spin, can never occupy the same atomic orbital.

15. ‘Al’ has electronic configuration, 1s2, 2s2, __________.

16. In a group of Periodic Table, the ionization potential __________ from top to bottom as the size of atom increases.

17. Ionization potential values __________ from left to right in a period.

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