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 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 12 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the atomic number for an element with three protons? A) 3. B) 1. C) 6. D) 2. Show Answer Correct Answer: A) 3. 2. In Argon atom how many total electrons can have s=+1/2 A) 5. B) 10. C) 18. D) 9. Show Answer Correct Answer: D) 9. 3. This subatomic particle contributes to the mass but not the charge of an atom. A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: B) Neutron. 4. If we start off with element $_{24}$X$^{50}$ after an alpha decay we get another element Y that looks like A) $_{22}$Y$^{46}$. B) $_{22}$Y$^{50}$. C) $_{26}$Y$^{54}$. D) $_{20}$Y$^{48}$. Show Answer Correct Answer: A) $_{22}$Y$^{46}$. 5. What is the basic unit (or smallest piece) of a chemical element? A) Atom. B) Neutron. C) Electron. D) Proton. Show Answer Correct Answer: A) Atom. 6. How many orbitals contain the value n=5 l=1? A) 53. B) 3. C) 4. D) 6. Show Answer Correct Answer: B) 3. 7. The relative mass of an electron is ..... A) 2. B) 0. C) 1. D) 3. Show Answer Correct Answer: B) 0. 8. What are Isobars? A) Atoms with Different mass number, but same Atomic numbers. B) Atoms with different atomic numbers, but same mass number. C) Neutrons of an Element. D) Protons of an Element. Show Answer Correct Answer: B) Atoms with different atomic numbers, but same mass number. 9. The mass of proton was ..... times electron A) 20. B) 1200. C) 20000. D) 2000. Show Answer Correct Answer: D) 2000. 10. In photoelectric effect, the kinetic energy of the photoelectrons increases linearly with the A) Velocity of incident light. B) Frequency of incident light. C) Atomic mass of the element. D) Wavelength of incident light. Show Answer Correct Answer: B) Frequency of incident light. 11. A line spectrum is produced when an electron moves from one energy level A) To a higher energy level. B) To a lower energy level. C) To another position in the same sublevel. D) Into the nucleus. Show Answer Correct Answer: B) To a lower energy level. 12. X atom has 12 protons. what is the electron arrangement of atom X? A) 2.8.2. B) 2.10. C) 2.8. D) 2.8.8. Show Answer Correct Answer: A) 2.8.2. 13. Atoms that have a net charge: A) Isotope. B) Elements. C) Ions. D) All atoms have a net charge. Show Answer Correct Answer: C) Ions. 14. Which of the following sets of quantum numbers are valid A) N = 2, l = 2, m =-2, s =-1/2. B) N = 2, l = 2, m = 0, s =-1/2. C) N = 1, l = 2, m = 0, s =-1/2. D) N = 2, l = 2, m = 0, s = 0. Show Answer Correct Answer: B) N = 2, l = 2, m = 0, s =-1/2. 15. The fundamental particles in an atom which is present inside the nucleus A) Proton and electron. B) Proton and neutron. C) Proton only. D) Neutron only. Show Answer Correct Answer: B) Proton and neutron. 16. Calculate the energy associated with the first orbit of He$^{+}$. what is the radius of this orbit? A) -2.18X10$^{-18}$J, 0.0529nm. B) -8.72X10$^{-18}$J, 0.0529nm. C) -2.18X10$^{-18}$J, 0.02645nm. D) -8.72X10$^{-18}$J, 0.02645nm. Show Answer Correct Answer: D) -8.72X10$^{-18}$J, 0.02645nm. 17. How does the intensity affect the photoelectric current? A) No effect. B) As the intensity increases, the photoelectric effect decreases. C) As intensity increases, the photoelectric effect increases. D) As the intensity decreases, the photoelectric effect becomes twice. Show Answer Correct Answer: C) As intensity increases, the photoelectric effect increases. 18. An element's identity is determined by the number of A) Valence. B) Protons. C) Neutrons. D) Electrons. Show Answer Correct Answer: B) Protons. 19. Atoms that have the same number of protons but different numbers of neutrons is known as A) Isotope. B) Isotone. C) Isomer. D) Isobar. Show Answer Correct Answer: A) Isotope. 20. Electron moves around nucleus of atom which contain proton. true or false A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 21. Which region does the Lyman series belong to? A) Infrared. B) Visible. C) Ultraviolet. D) X-rays. Show Answer Correct Answer: C) Ultraviolet. 22. Identify an element with three shells and zero valency. A) Helium. B) Argon. C) Kyrpton. D) Neon. Show Answer Correct Answer: B) Argon. 23. What is the maximum number of electrons that can occupy the first shell of an atom? A) 8. B) 18. C) 32. D) 2. Show Answer Correct Answer: D) 2. 24. How many electrons are present in M-shell of an element with atomic number 20? A) 8. B) 5. C) 18. D) 12. Show Answer Correct Answer: A) 8. 25. Which of the following is a property of isotope? A) They have the same number of protons. B) They have the same number of electrons. C) They have different chemical properties. D) They have the same mass number. Show Answer Correct Answer: B) They have the same number of electrons. 26. How was the electron discovered? A) Cathode Ray Tube. B) Gold Foil Experiment. C) Double-Slit experiment. D) Newton's prism experiment. Show Answer Correct Answer: A) Cathode Ray Tube. 27. The line with the shortest wavelength is produced in the hydrogen spectrum when electron moves A) From n=2 to n=1. B) From n=3 to n=1. C) From n=4 to n=3. D) From n=4 to n=1. Show Answer Correct Answer: D) From n=4 to n=1. 28. Subsidiary Quantum Number is given by which formula A) N$^{2}$. B) 2n$^{2}$. C) +1/2. D) 0 to (n-1). Show Answer Correct Answer: D) 0 to (n-1). 29. 1) For hydrogen atom, the minimum excitation energy (of n=2) is ..... A) 13.6 e V. B) -10.2 e V. C) 3.4 e V. D) 10.2 e V. Show Answer Correct Answer: D) 10.2 e V. 30. Which of the following has frequencies higher than ultraviolet rays? A) Visible light. B) Infrared rays. C) X-rays. D) None of the above. Show Answer Correct Answer: C) X-rays. 31. Which of the following isotope is used in the treatment of blood cancer?(a) P-32(b) I-131(c) Co-60(d) C-14 A) B. B) D. C) C. D) A. Show Answer Correct Answer: C) C. 32. In a model of an atom, what particle is responsible for the identity of an atom? A) Valence electrons. B) Neutrons. C) Nucleus. D) Protons. Show Answer Correct Answer: D) Protons. 33. Elements with valency 1 are A) Always metals. B) Always metalloids. C) Either metals or non-metals. D) Always non-metals. Show Answer Correct Answer: C) Either metals or non-metals. 34. Al is the symbol for ..... A) Gold. B) Aluminum. C) Arsenic. D) Silver. Show Answer Correct Answer: B) Aluminum. 35. G-subshell start from A) 2nd energy level. B) 4th energy level. C) 3rd energy level. D) 5th energy level. Show Answer Correct Answer: D) 5th energy level. 36. Electron was discovered by A) J.J thomson. B) E. Goldstein. C) Rutherford. D) None of the above. Show Answer Correct Answer: A) J.J thomson. 37. Calculate the energy of a gamma ray photon whose frequency is 5.02 x 10$^{20}$ Hz? A) 6.63 x 10$^{-34}$$^{}$ J. B) 7.57 x 10$^{53 }$$^{J}$. C) 3.33 x 10$^{-13}$J. D) 1.32 x 10$^{-54}$J. Show Answer Correct Answer: C) 3.33 x 10$^{-13}$J. 38. Which quantum number is not required to describe an orbital? A) Ml. B) N. C) Ms. D) L. Show Answer Correct Answer: A) Ml. 39. H$_{2 }$+ Cl$_{2 }$gives out A) Two atoms of Chlorine. B) Two molecules of Hydrochloric acid. C) Two molecules of water. D) None of the above. Show Answer Correct Answer: B) Two molecules of Hydrochloric acid. 40. This neutrally charged subatomic particle is found in the nucleus. A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: B) Neutron. 41. What is the smallest unit of an element that retains the properties of that element? A) Molecule. B) Atom. C) Proton. D) Electron. Show Answer Correct Answer: B) Atom. 42. What is the mass number of an element? A) Incorrect option 1. B) Incorrect option 3. C) Incorrect option 2. D) Correct answer for the question. Show Answer Correct Answer: D) Correct answer for the question. 43. Which gas is liberated when Zinc reacts with hydrochloric acid A) No gas. B) Hydrogen. C) Chlorine. D) None of the above. Show Answer Correct Answer: B) Hydrogen. 44. How many periods or rows are there on the periodic table? A) 7. B) 18. C) 6. D) 17. Show Answer Correct Answer: A) 7. 45. Which of the following elements is a noble gas? A) Oxygen. B) Hydrogen. C) Neon. D) Nitrogen. Show Answer Correct Answer: C) Neon. 46. According to Bohr's model, the radius of the second orbit of helium atom is A) 1.06 A. B) 0.53 A. C) 2.12 A. D) 0.265 A. Show Answer Correct Answer: A) 1.06 A. 47. Which transition in the hydrogen atomic spectrukbwill have the same wavelength as the transition n=4 to n= 2 of He+ spectrum? A) N=4 to n=3. B) N=4 to n=2. C) N=3 to n=1. D) N=2 to n=1. Show Answer Correct Answer: D) N=2 to n=1. 48. Identify an element with twice the number of electrons in its L shell as in its K shell. A) Aluminium. B) Carbon. C) Silicon. D) Sulfur. Show Answer Correct Answer: B) Carbon. 49. Be is the symbol for the element ..... A) Boron. B) Bromine. C) Beryllium. D) Barium. Show Answer Correct Answer: C) Beryllium. 50. Proton was discovered by A) Thomson. B) Goldstein. C) Chadwick. D) Rutherford. Show Answer Correct Answer: B) Goldstein. 51. HOW MANY ELECTRONS ARE PRESENT IN OXIDE ION? A) 8. B) 9. C) 10. D) 11. Show Answer Correct Answer: C) 10. 52. Which particle does not contribute mass to the atom? A) Neutron. B) Proton. C) Electron. D) Nucleus. Show Answer Correct Answer: C) Electron. 53. "It is impossible to determine simultaneously, the exactposition and exact momentum (or velocity) of an electron." This is the statement of A) Hund's Rule. B) Heisenberg's Uncertainty Principle. C) Aufbau Principle. D) Pauli's Exclusion Principle. Show Answer Correct Answer: B) Heisenberg's Uncertainty Principle. 54. What is the uncertainty in the position of a particle if the uncertainty is its momentum is 3.3 x 10$^{-2}$ kg ms$^{-1}$ . A) 1.6 x 10$^{-33}$ m. B) 1.6 x 10$^{-35}$ m. C) 3.2 x 10$^{-34}$ m. D) 3.2 x 10$^{-33}$ m. Show Answer Correct Answer: A) 1.6 x 10$^{-33}$ m. 55. What is the charge and location of a neutron? A) Neutrons have a positive charge and are in the nucleus. B) Neutrons have no charge and are in the electron cloud. C) Neutrons have no charge and are in the nucleus. D) Neutrons have a negative charge and are in the nucleus. Show Answer Correct Answer: C) Neutrons have no charge and are in the nucleus. 56. 1-Which one will have the highest 2$^{nd}$ ionisation energy? A) 1s$^{2}$ 2s$^{2 }$2p$^{6}$. B) 1s$^{2}$ 2s$^{2}$ 2p$^{4}$. C) 1s$^{2}$ 2s$^{2}$ 2p$^{6}$ 3s$^{2}$. D) 1s$^{2}$ 2s$^{2}$ 2p$^{6}$ 3s$^{1}$. Show Answer Correct Answer: D) 1s$^{2}$ 2s$^{2}$ 2p$^{6}$ 3s$^{1}$. 57. Which of the following led to the discovery of neutrons? A) Discharge tube experiment. B) Alpha ray scattering experiment. C) Chadwick's experiment. D) Oil drop experiment. Show Answer Correct Answer: C) Chadwick's experiment. 58. What did John Dalton describe atoms as? A) Nuclear models. B) Plum pudding models. C) Orbiting electrons. D) Solid spheres. Show Answer Correct Answer: D) Solid spheres. 59. How many orbitals can have the following set of quantum numbers, n = 3, l = 1, ml = +1? A) 2. B) 4. C) 1. D) 3. Show Answer Correct Answer: C) 1. 60. AN ATOM DIFFERS FROM ION WITH RESPECT TO: A) NO OF NEUTRONS. B) NO OF ELECTRONS. C) NO OF PROTONS. D) MASS NO. Show Answer Correct Answer: B) NO OF ELECTRONS. ← 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 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books