This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the atomic number for an element with 41 neutrons and a mass number of 80? A) 121. B) 39. C) 80. D) 41. Show Answer Correct Answer: B) 39. 2. A(n) is the building block of matter. A) Atom. B) Proton. C) Nucleus. D) Electron. Show Answer Correct Answer: A) Atom. 3. Electrons are found in the nucleus of the atom A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 4. Who discovered that atoms are mostly empty space? A) Thomson. B) Rutherford. C) Dalton. D) Bohr. Show Answer Correct Answer: B) Rutherford. 5. Which subatomic particle is the smallest by far? A) Protons. B) Neutrons. C) Electrons. D) All are small, but equal in size. Show Answer Correct Answer: C) Electrons. 6. In isotopes of an element, the difference is in the number of A) Protons. B) Electrons. C) Neutrons. D) Protons and electrons. Show Answer Correct Answer: C) Neutrons. 7. Which of the following elements contains only two electrons in the outermost shell? A) Helium. B) Beryllium. C) Magnesium. D) All of these. Show Answer Correct Answer: D) All of these. 8. Matter is made up of atoms A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. Which scientist proposed the idea that electrons orbit the nucleus in set energy levels? A) Bohr. B) Rutherford. C) Thomson. D) Dalton. Show Answer Correct Answer: A) Bohr. 10. Which of the following best describes a proton? A) It has no charge and makes up part of the mass in an atom. B) It has a negative charge and makes up part of the mass in an atom. C) It has a positive charge and makes up part of the mass in an atom. D) Tacos, always tacos. Show Answer Correct Answer: C) It has a positive charge and makes up part of the mass in an atom. 11. This element has 20 neutrons and 19 positively charged particles A) Rb. B) Kr. C) K. D) Xe. Show Answer Correct Answer: C) K. 12. The ionization energy of hydrogen atom in its ground state is A) 10.2 e V. B) 13.6 e V. C) -13.6 e V. D) 3.4 e V. Show Answer Correct Answer: B) 13.6 e V. 13. How many orbitals are there in n=3 shell? A) 3. B) 8. C) 9. D) 6. Show Answer Correct Answer: C) 9. 14. Bohr's model of atom is not in agreement with A) Heisenberg's principle. B) Planck's theory. C) Pauli's principle. D) Line spectra of hydrogen atom. Show Answer Correct Answer: A) Heisenberg's principle. 15. What are the 3 subatomic particles of an atom? A) Protons, neutrons, electrons. B) Nucleus, protons, electrons. C) Quarks, neutrons, protons. D) Carbon atom, proton, electron. Show Answer Correct Answer: A) Protons, neutrons, electrons. 16. A joining together A) Fusion. B) Fission. C) Frustration. D) Furious. Show Answer Correct Answer: A) Fusion. 17. If energy is added to an electron, the electron move to the new orbit known as A) Lower energy level. B) Excited state. C) Ground state. D) None of the above. Show Answer Correct Answer: B) Excited state. 18. J . J Thomson's atomic model didn't have any drawbacks A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 19. Hydrogen has 1 proton. It's atomic number is: A) 1. B) Cannot be determined. C) 2. D) 0. Show Answer Correct Answer: A) 1. 20. What property of an element determines its chemical behaviour? A) Size of an element. B) Valency of an element. C) Molar mass of the element. D) None of these. Show Answer Correct Answer: B) Valency of an element. 21. What is the number of radial nodes in 3s orbital? A) 2. B) 3. C) 1. D) 0. Show Answer Correct Answer: A) 2. 22. How can we find the atomic no of an element? A) No. of neutrons. B) No. of protons. C) No. of electrons. D) No. of shells. Show Answer Correct Answer: B) No. of protons. 23. How many paired electrons are in an atom of Chlorine? A) 16. B) 2. C) 8. D) 7. Show Answer Correct Answer: A) 16. 24. What are neutrons characterized by? A) No charge. B) Negative charge. C) Double charge. D) Positive charge. Show Answer Correct Answer: A) No charge. 25. The electrons acquiring same orbital are distinguished by A) Principal quantum number. B) Magnetic quantum number. C) Azimuthal quantum number. D) Spin quantum number. Show Answer Correct Answer: D) Spin quantum number. 26. What are the three subatomic particles that make up an atom? A) Protons, electrons, and quarks. B) Protons, neutrons, and electrons. C) Electrons, photons, and neutrinos. D) Protons, neutrons, and positrons. Show Answer Correct Answer: B) Protons, neutrons, and electrons. 27. The p sub shell has A) One orbital. B) Two orbitals. C) Four orbitals. D) Three orbirals. Show Answer Correct Answer: D) Three orbirals. 28. In which of the following pairs, the ions are iso-electronic?(i) Na+, Mg$^{2+}$(ii) Al$^{3+}$, O-(iii) Na+, O$^{2-}$(iv) N$^{3-}$, Cl- A) (ii), (iv). B) (ii), (iv). C) (i), (iii). D) (i), (ii). Show Answer Correct Answer: C) (i), (iii). 29. Which subatomic particle is the heaviest? A) Positron. B) Proton. C) Electron. D) Neutron. Show Answer Correct Answer: D) Neutron. 30. An alpha particle contains A) 4 positive charge and 2 mass unit. B) 2 positive charge and 4 mass unit. C) 2 positive charge and 2 mass unit. D) 4 positive charge and 4 mass unit. Show Answer Correct Answer: B) 2 positive charge and 4 mass unit. 31. Emission of light from an atom occurs when an electron A) Drops from a higher to a lower energy level. B) Jumps from a lower to a higher energy level. C) Moves within its atomic orbital. D) Falls into the nucleus. Show Answer Correct Answer: A) Drops from a higher to a lower energy level. 32. Protons was discovered in the year 1886 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 33. Who discovered anode rays A) Rutherford. B) J J Thomson. C) Bohr. D) E Goldstein. Show Answer Correct Answer: D) E Goldstein. 34. The highest Cricket ground in the world is located in India. Where is it located? A) Chail, Himachal Pradesh. B) Dharamshala, Himachal Pradesh. C) Nainital, Uttarakhand. D) Dehradun, Uttarakhand. Show Answer Correct Answer: A) Chail, Himachal Pradesh. 35. Orbital angular momentum depends on ..... A) L. B) L and m. C) M and s. D) N and l. Show Answer Correct Answer: A) L. 36. Which of the following elements does not exhibit electrovalency? A) Chromium. B) Carbon. C) Cadmium. D) Calcium. Show Answer Correct Answer: B) Carbon. 37. Carbon valency is? A) +4. B) -4. C) +4 and-4. D) 8. Show Answer Correct Answer: C) +4 and-4. 38. Found in the nucleus of the atom A) Electrons only. B) Protons only. C) Neutrons and protons. D) Neutrons and electrons. Show Answer Correct Answer: C) Neutrons and protons. 39. Atomic mass is refers to A) Proton number. B) Combination of proton and electron. C) Combination of proton and neutron. D) None of the above. Show Answer Correct Answer: C) Combination of proton and neutron. 40. What is the ratio of energies of an electron is 1st orbits of He$^{+}$ and H? A) 2:1. B) 1:1. C) 1:2. D) 4:1. Show Answer Correct Answer: D) 4:1. 41. Which of the following elements has a full outer electron shell? A) Helium. B) Oxygen. C) Lithium. D) Carbon. Show Answer Correct Answer: A) Helium. 42. Particles move fastest in a A) Slime. B) Gas. C) Solid. D) Liquid. Show Answer Correct Answer: B) Gas. 43. The correct set of four quantum numbers for the balance electron of rubidium atom(z=37) is A) 5, 0, 0, +1/2. B) 5, 1, 0, -1/2. C) 6, 0, 0, +1/2. D) 5, 1, 1, +1/2. Show Answer Correct Answer: A) 5, 0, 0, +1/2. 44. If an element has 6 shells, then what will be the maximum number of electrons in the second-last shell? A) 36. B) 50. C) 8. D) 32. Show Answer Correct Answer: B) 50. 45. The atomic mass is ..... ? A) Average mass of an atom of an element. B) Number of Electrons. C) Number of Protons. D) Number of Neutrons. Show Answer Correct Answer: A) Average mass of an atom of an element. 46. Which one of the following statements is true of the hydrogen spectrum? A) Each series consists of the same number of lines. B) The last line in each series has the shortest wavelength. C) The lines converge as the wavelength increases. D) The lines are all coloured. Show Answer Correct Answer: B) The last line in each series has the shortest wavelength. 47. Which model of the atom proposed that atoms were positive spheres with negative electrons in them? A) Solid Sphere Model. B) Plum Pudding Model. C) Planetary Model. D) Heliocentric Model. Show Answer Correct Answer: B) Plum Pudding Model. 48. An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom? A) 6. B) 13. C) 12. D) 7. Show Answer Correct Answer: A) 6. 49. The symbol for the element POTASSIUM is ..... A) P. B) Po. C) K. D) Pt. Show Answer Correct Answer: C) K. 50. The principal quantum number describes A) Spin of electron. B) Energy of each orbital. C) Shape of orbital. D) Size of the orbital. Show Answer Correct Answer: B) Energy of each orbital. 51. H is the symbol for ..... A) Holmium. B) Hydrogen. C) Mercury. D) Helium. Show Answer Correct Answer: B) Hydrogen. 52. A(n) is a particle that has mass but no charge. A) Electron. B) Neutron. C) Plasma. D) Proton. Show Answer Correct Answer: B) Neutron. 53. State the number of radial nodes present in 3p subshell A) 2. B) 4. C) 3. D) 1. Show Answer Correct Answer: D) 1. 54. Who performed experiments to prove the presence of protons in the nucleus? A) J J Thomson. B) James Chadwick. C) Ernest Rutherford. D) John Dalton. Show Answer Correct Answer: C) Ernest Rutherford. 55. Calculate the wave number for the longest wavelength transition in Balmer series of Hydrogen atom A) 15232.9cm$^{-1}$. B) 27425cm$^{-1}$. C) Not enough information given. D) 109700cm$^{-1}$. Show Answer Correct Answer: A) 15232.9cm$^{-1}$. 56. 1) When an electron jumps higher energy orbit to lower energy orbit, the difference in the energies in the two orbits is radiated as quantum (photon) of ..... A) $E=\frac{\lambda}{hc}$. B) $E=mc^2$. C) $E=\frac{hc}{\lambda}$. D) $E=\frac{h}{\nu}$. Show Answer Correct Answer: C) $E=\frac{hc}{\lambda}$. 57. The first electron shell can old how many electrons? A) 4. B) 6. C) 8. D) 2. Show Answer Correct Answer: D) 2. 58. The total number of orbitals in a shell with principal quantum number 'n' is A) 2n$^{2}$. B) N$^{2}$. C) 2n. D) N+1. Show Answer Correct Answer: B) N$^{2}$. 59. What is the mass number and name of an element with 8 protons and 8 neutrons? A) 8-Neon. B) 16-Carbon. C) 24-Oxygen. D) 16-Oxygen. Show Answer Correct Answer: D) 16-Oxygen. 60. Discovered the nucleus of the atom A) Bohr. B) Rutherford. C) Dalton. D) Thomson. Show Answer Correct Answer: B) Rutherford. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 1Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 2Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 3Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 5Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 6Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 7Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 8Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books