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 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following statements is true about the periodic table? A) Elements are arranged by increasing atomic mass. B) Elements are arranged by increasing atomic number. C) Elements are arranged by decreasing atomic number. D) Elements are arranged randomly. Show Answer Correct Answer: B) Elements are arranged by increasing atomic number. 2. THE EXPERIMENT THAT LEAD TO THE DISCOVERY OF ATOMIC NUCLEUS A) WATER MELON MODEL. B) CHRISTMAS PUDDING MODEL. C) DISCHARGE TUBE EXPERIMENT. D) ALPHA PARTICLE SCATTERING EXPERIMENT. Show Answer Correct Answer: D) ALPHA PARTICLE SCATTERING EXPERIMENT. 3. What comes between? Magnesium ..... Silicon. A) Argon. B) Aluminium. C) Phosphorus. D) Sodium. Show Answer Correct Answer: B) Aluminium. 4. A hydrogen atom (ionisation potential 13.6 eV) makes a transition from third excited state to first excited state. The energy of the photon emitted in the process is A) 12.75 eV. B) 1.89 eV. C) 12.09 eV. D) 2.55 eV. Show Answer Correct Answer: D) 2.55 eV. 5. Rutherford experimented with ..... A) Gold foil and alpha particles. B) Cathode rays and alpha particles. C) Electron and alpha particles. D) Gold foil and cathode rays. Show Answer Correct Answer: A) Gold foil and alpha particles. 6. Which of the following expressions gives the de-Brogiie relationship? A) $\lambda$ = h / mv. B) $\lambda$ = h / mp. C) $\lambda$ = h / m. D) P = h / mv. Show Answer Correct Answer: A) $\lambda$ = h / mv. 7. In a neutral atom, what is the number of protons equal to? A) The number of electrons. B) The number of nuclei. C) The number of molecules. D) The number of neutrons. Show Answer Correct Answer: A) The number of electrons. 8. Drawback of JJ Thompson? A) Protons and electrons mixed together. B) Absence of neutrons. C) No practical proof. D) All the above. Show Answer Correct Answer: D) All the above. 9. What is the charge of an atom A) Neutral. B) Positive or negative. C) Negative. D) Positive. Show Answer Correct Answer: A) Neutral. 10. Name the scientist known as the father of the Modern Atomic Theory who proposed his theory in 1808. A) John Dalton. B) J J Thomson. C) Max Plank. D) Rutherford. Show Answer Correct Answer: A) John Dalton. 11. Which of the following result in the discovery of proton A) Alpha rays. B) X rays. C) Canal rays. D) Cathode rays. Show Answer Correct Answer: C) Canal rays. 12. Which of the following does not match the characteristics of an Isotope? A) Isotopes are the atoms of different elements. B) Isotopes of some elements are radioactive. C) Isotopes differ in number of neutrons. D) Isotopes have similar chemical properties. Show Answer Correct Answer: A) Isotopes are the atoms of different elements. 13. I want to study 10th at A) Roopak 's Bhaiya. B) Obviously at Roopak bhaiya's. C) Anywhere. D) None. Show Answer Correct Answer: B) Obviously at Roopak bhaiya's. 14. How many neutrons does an atom of hydrogen contain? A) 3. B) 1. C) 2. D) 0. Show Answer Correct Answer: D) 0. 15. In which year Wilhelm Roentgen discovered x-ray? A) 9 Nov 1897. B) 8 Nov 1895. C) 8 Nov 1985. D) 8 Dec 1895. Show Answer Correct Answer: B) 8 Nov 1895. 16. FIND OUT THE ATOMIC NO OF ELEMENT IF ITS BOTH K AND L SHELLS ARE COMPLETELY FULL: A) 20. B) 12. C) 11. D) 10. Show Answer Correct Answer: D) 10. 17. Water is an element A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 18. Which of the following correctly represent the electronic distribution in theMg atom? A) 1, 8, 3. B) 2, 8, 2. C) 3, 8, 1. D) 8, 2, 2. Show Answer Correct Answer: B) 2, 8, 2. 19. Who stated that electrons move in layers or shells? A) Chadwick. B) Dalton. C) Bohr. D) Rutherford. Show Answer Correct Answer: C) Bohr. 20. What are the negatively charged particles of an atom called as? A) Protons. B) Neutrons. C) Electrons. D) None of the above. Show Answer Correct Answer: C) Electrons. 21. What is the electronic configuration of Cu? A) [Ne]3d$^{10}$4s$^{1}$. B) [Ar]3d$^{10}$4s$^{1}$. C) [Ar]3d$^{9}$4s$^{2}$. D) [Ne]3d$^{9}$4s$^{2}$. Show Answer Correct Answer: B) [Ar]3d$^{10}$4s$^{1}$. 22. True or False:The nucleus contains the mass of an atom. A) True. B) False. C) Maybe. D) None of the above. Show Answer Correct Answer: A) True. 23. What is located in the atom's nucleus? A) Electrons and protons. B) Neutrons and electrons. C) Protons and neutrons. D) None of the above. Show Answer Correct Answer: C) Protons and neutrons. 24. An atom's mass number equals the number of ..... A) Protons plus the number of neutrons. B) Neutrons. C) Protons plus the number of electrons. D) Protons. Show Answer Correct Answer: A) Protons plus the number of neutrons. 25. A sub-atomic particle with no charge A) Electron. B) Neutron. C) Proton. D) Nucleus. Show Answer Correct Answer: B) Neutron. 26. The number of valence electrons in a sulphide ion, S2-, is: A) 8. B) 10. C) 9. D) 16. Show Answer Correct Answer: A) 8. 27. 14-Which is not true about the noble gases? A) They are non metallic in nature. B) They exist in atomic form. C) All are radioactive in nature. D) Xenon is the most reactive among these. Show Answer Correct Answer: C) All are radioactive in nature. 28. A substance that conducts heat and electricity well and is malleable A) Metal. B) Non-Metal. C) Element. D) Malleable. Show Answer Correct Answer: A) Metal. 29. An element has a mass number of 31 and an atomic number of 15. How many total particles are inside the nucleus and outside the nucleus? A) 16, 15. B) 15, 31. C) 15, 15. D) 31, 15. Show Answer Correct Answer: D) 31, 15. 30. Which of the following is the most penetrating. A) Alpha particles. B) Electrons. C) Neutrons. D) Protons. Show Answer Correct Answer: C) Neutrons. 31. Maximum number of electrons present in 'N' shell is A) 8. B) 18. C) 32. D) 2. Show Answer Correct Answer: C) 32. 32. Which of the following has a positive charge? A) Protron. B) Neutron. C) Onion. D) None of ththe above. Show Answer Correct Answer: A) Protron. 33. The valency of sulphate group is A) 2. B) 4. C) 8. D) None of the above. Show Answer Correct Answer: A) 2. 34. True or False:An element's atomic number tells how many protons are in the nucleus of an atom of that element. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 35. Which of the following statement is correct about the atom of an element? A) An atom can have only protons and neutrons but no electrons. B) An atom can have only electrons and neutrons but no protons. C) An atom can have only electron and proton but no neutron. D) An atom must always have a proton, neutron and electron. Show Answer Correct Answer: C) An atom can have only electron and proton but no neutron. 36. The concept of orbit was used by A) Bohr. B) Plank. C) Rutherford. D) J.J. Thomson. Show Answer Correct Answer: A) Bohr. 37. What is the formulae to find the no of electrons in a discrete orbit? A) $2n$. B) $2n^2$. C) $\left(2n\right)^2$. D) $2n^4$. Show Answer Correct Answer: B) $2n^2$. 38. A uncharged particle in the nucleus of an atom is a ..... A) Electron. B) Neutron. C) Proton. D) None of the above. Show Answer Correct Answer: B) Neutron. 39. For n=7, the value of l is A) L=7. B) L= 5. C) L=6, 5, 4, 3, 2, 1. D) L= 6. Show Answer Correct Answer: C) L=6, 5, 4, 3, 2, 1. 40. The nucleus of an atom is charged. A) Variable. B) Not. C) Positively (+). D) Negatively (-). Show Answer Correct Answer: C) Positively (+). 41. An electron is exited from the energy level n=2 to the energy n=6. Which of the following statements is correct? A) The electron cannot return to the energy level n=1. B) The electron will achieve a higher stability. C) Energy with a frequency corresponding to that of green light is absorbed. D) This transition produces a dark line in the violet region of visible light. Show Answer Correct Answer: D) This transition produces a dark line in the violet region of visible light. 42. Isobars having ..... physical properties and ..... chemical properties. A) Same, same. B) Same, different. C) Different, same. D) Different different. Show Answer Correct Answer: B) Same, different. 43. Wave length of an electron moving with velocity 2.05 x 10$^{7 }$m/s A) 4.55 x 10$^{-11 }$m. B) 3.00 x 10$^{-11 }$m. C) 3.55 x 10$^{-11 }$m. D) 3.55 x 10$^{-10 }$m. Show Answer Correct Answer: C) 3.55 x 10$^{-11 }$m. 44. Which model of the atom describes electrons orbiting the nucleus in fixed paths? A) Bohr model. B) Quantum mechanical model. C) Rutherford model. D) Thomson model. Show Answer Correct Answer: A) Bohr model. 45. According to Ernest Rutherford, an atom is made of mostly ..... A) Protons. B) Electrons. C) The nucleus. D) Empty space. Show Answer Correct Answer: D) Empty space. 46. What is the shape of d orbitals? A) Clover-shaped. B) Orbit radius = constant. C) Only two orbitals per shell. D) Spiral. Show Answer Correct Answer: A) Clover-shaped. 47. Which sign is used to indicate the direction of the chemical reaction? A) Less than sign. B) Greater than sign. C) Arrow sign. D) None of the above. Show Answer Correct Answer: C) Arrow sign. 48. ELECTRONIC CONFIGURATION OF CALCIUM IS A) 2, 7, 7, 4,. B) 2, 8, 7, 3,. C) 2, 8, 8, 2. D) 2, 8, 9. Show Answer Correct Answer: C) 2, 8, 8, 2. 49. If an atom has 3 electrons, how many protons does it have? A) 4. B) 1. C) 2. D) 3. Show Answer Correct Answer: D) 3. 50. What subatomic particles would you find in the nucleus of an atom? A) Protons only. B) Protons and Neutrons. C) Neutrons and Electrons. D) Protons and Electrons. Show Answer Correct Answer: B) Protons and Neutrons. 51. Which shape is associated with the orbital designated by n=2, l=1 A) Pyramidal. B) Spherical. C) Tetrahedral. D) Dumb-bell. Show Answer Correct Answer: D) Dumb-bell. 52. Most of the mass in an atom is concentrated in the ..... A) Electrons. B) Nucleus. C) Empty space. D) Protons. Show Answer Correct Answer: B) Nucleus. 53. De Broglie equation is the mathematical expression to support A) Dual nature of matter. B) Energy of a particular shell. C) Uncertainty in position of an electron. D) Line Spectrum of hydrogen. Show Answer Correct Answer: A) Dual nature of matter. 54. Heisenberg Uncertainty principle is significant for ..... A) Microscopic objects. B) Any object. C) Macroscopic objects. D) All objects. Show Answer Correct Answer: A) Microscopic objects. 55. An element has 17 protons and 18 neutrons in the nucleus. What is the element's mass number? A) 35. B) 1. C) 18. D) 17. Show Answer Correct Answer: A) 35. 56. Atoms of same element with same atomic number but different mass number A) Ispbars. B) Isotopes. C) Isotherm. D) Isotones. Show Answer Correct Answer: B) Isotopes. 57. The central region of an atom where most of the atom's mass can be found A) Electron cloud. B) Center. C) Nucleus. D) Core. Show Answer Correct Answer: C) Nucleus. 58. Negatively charged particles within the electron cloud outside the nucleus. A) Electrons. B) Neutrons. C) Isotopes. D) Protons. Show Answer Correct Answer: A) Electrons. 59. Why does the nucleus of an atom always have a positive charge? A) The nucleus is positive because it contains protons. B) The nucleus is positive because it contains neutrons. C) The nucleus is positive because it contains electrons. D) None of the above. Show Answer Correct Answer: A) The nucleus is positive because it contains protons. 60. How many protons are present in phosphorus-31 A) 31. B) 16. C) 15. D) 46. Show Answer Correct Answer: C) 15. ← 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 4Class 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