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 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 17 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A subatomic particle that has a positive electric charge A) Isotope. B) Electron. C) Proton. D) Neutron. Show Answer Correct Answer: C) Proton. 2. Positive rays give flash on A) AgNO$_{3}$ plate. B) ZnO. C) AgCl plate. D) ZnS. Show Answer Correct Answer: D) ZnS. 3. What electrical charge does a proton have? A) -1. B) 0. C) +1. D) +2. Show Answer Correct Answer: C) +1. 4. Limiting line of any spectral series in the hydrogen spectrum is the line when n2 in the Rydberg formula is A) Two. B) Four. C) Infinity. D) Zero. Show Answer Correct Answer: C) Infinity. 5. Ns-orbital has ..... nodes, A) 2n$^{2}$. B) 2n. C) N-1. D) N+1. Show Answer Correct Answer: C) N-1. 6. Where is the electron located? A) Orbital. B) Nucleus. C) In the inside of the atom. D) Matter. Show Answer Correct Answer: A) Orbital. 7. What was the major flaw in Rutherford's model? A) It did not account for neutrons. B) It suggested atoms could collapse. C) It was based on the solid sphere model. D) It did not include electrons. Show Answer Correct Answer: B) It suggested atoms could collapse. 8. What determines the chemical element of an atom? A) Number of neutrons. B) Number of electrons. C) Atomic mass. D) Number of protons. Show Answer Correct Answer: D) Number of protons. 9. Which gas is released when sodium carbonate reacts with dilute Hydrochloric acid? A) Hydrogen. B) Oxygen. C) Carbon dioxide. D) None of the above. Show Answer Correct Answer: C) Carbon dioxide. 10. The subatomic particle that determines the identity of an element. A) Proton. B) Electron. C) Neutron. D) Outer shell. Show Answer Correct Answer: A) Proton. 11. Who discovered that the atom had an small, dense, positively charged center? A) J.J Thomson. B) John Dalton. C) Ernest Rutherford. D) Robert Millikan. Show Answer Correct Answer: C) Ernest Rutherford. 12. Elements are represented by chemical symbol. Symbols are written with A) All lower case letters. B) All capital letters. C) Always only one letter. D) At least and ONLY one capital letter. Show Answer Correct Answer: D) At least and ONLY one capital letter. 13. Which of the following electron transition occurs in the ultraviolet range of the elctromagnet spectrum? A) N$_{3 }$to n$_{1}$. B) N$_{2 }$to n$_{3}$. C) N$_{4 }$to n$_{3}$. D) N$_{3 }$to n$_{2}$. Show Answer Correct Answer: A) N$_{3 }$to n$_{1}$. 14. In Bohr's model, atomic radius of the first orbit is X, the radius of 3$^{rd}$ orbit is A) 9X. B) 3X. C) X/3. D) X. Show Answer Correct Answer: A) 9X. 15. Why don't we add electrons when calculating atomic mass? A) Because they are outside the nucleus. B) Because they are negatively charged. C) Because they are substantially smaller than a proton or neutron. D) We actually do add the electrons when solving for mass number. Show Answer Correct Answer: C) Because they are substantially smaller than a proton or neutron. 16. What kind of orbital must an electron with the principal quantum number n = 3 occupy? A) An s-orbital. B) A d-orbital. C) A p-orbital. D) Either an s, a p orbital or a d orbital. Show Answer Correct Answer: D) Either an s, a p orbital or a d orbital. 17. 2 elements X & Y combines to form a compound XY. The same compound is obtained from different experiment. give the law in accordance to above observation A) Law of conservation of mass. B) Law of multiple proportion. C) Law of constant proportion. D) None of the above. Show Answer Correct Answer: C) Law of constant proportion. 18. The maximum number of electrons that a valence shell of an atom can possess is ..... A) 8. B) 32. C) 7. D) 18. Show Answer Correct Answer: A) 8. 19. Which spectral line corresponds to the transition from n=3 to n=2 in hydrogen? A) Blue. B) Green. C) Violet. D) Red. Show Answer Correct Answer: D) Red. 20. How many electrons does Hydrogen have? A) 1. B) 3. C) 2. D) 0. Show Answer Correct Answer: A) 1. 21. An excited electron residing in the energy level n = 4 drops to n = 1. What is the wavelenght of the emission if the frequency is 3.09 x 10$^{15}$ Hz? (c = 3 x 10$^{8}$ ms$^{-1}$) A) 9.71 x 10$^{-8}$ m. B) 2.91 x 10$^{-7}$ m. C) 4.69 x 10$^{-6}$ m. D) 3.88 x 10$^{-7}$ m. Show Answer Correct Answer: A) 9.71 x 10$^{-8}$ m. 22. Radiation that has enough energy to remove an electron from shell cause A) Ionization. B) Excitation. C) All the above. D) None of the above. Show Answer Correct Answer: A) Ionization. 23. Atoms of the same element always have the same number of: A) Neutrons. B) Electrons. C) Protons. D) None of the above. Show Answer Correct Answer: C) Protons. 24. Pairing of electrons do not take place untill each orbital is single filled ..... A) Hundes rule of max. Multiplicity. B) Paulis exculsion principle. C) Afbaus principle. D) None of the above. Show Answer Correct Answer: A) Hundes rule of max. Multiplicity. 25. If an atom has 17 protons, 18 neutrons, and 17 electrons, what is the mass of this atom? A) 18. B) 17. C) 52. D) 35. Show Answer Correct Answer: D) 35. 26. In an alpha scattering experiment, few alpha particles rebounded because A) Most of the space in the atom is occupied. B) Positive charge of the atoms very little space. C) The mass of the atom is concentrated in the centre. D) All the positive charge and mass of the atom is concentrated in small volume. Show Answer Correct Answer: B) Positive charge of the atoms very little space. 27. What is its valency? A) (a)Number of electrons lost during a bond formation. B) (b) Number of electrons gained during a bond formation. C) (c) Number of electrons shared during a bond formation. D) All three options:(a), (b) and (c ). Show Answer Correct Answer: D) All three options:(a), (b) and (c ). 28. Mass of an Electron is about 1/20000 times that of Proton. True or False A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 29. How many electrons are present in n=3, l=1, m=-1 0 +1 A) 14. B) 2. C) 10. D) 6. Show Answer Correct Answer: D) 6. 30. The radioactive isotope used in the treatment of cancer is: A) Arsenic-74. B) Iodine-131. C) Cobalt-60. D) Plutonium-239. Show Answer Correct Answer: C) Cobalt-60. 31. Which radioactive element is used in the treatment of cancer? A) Cobalt-60. B) (a) Iodine-131. C) (c) Plutonium-239. D) (b) Uranium-234. Show Answer Correct Answer: A) Cobalt-60. 32. LAW OF ELECTROLYSIS related to which scientist? A) William Crooke. B) Michael Faraday. C) Humphry Davy. D) James Chadwick. Show Answer Correct Answer: B) Michael Faraday. 33. What is the electron configuration of an atom? A) The electron configuration of an atom is the total mass of the atom. B) The electron configuration of an atom is the number of protons in the nucleus. C) The electron configuration of an atom is the arrangement of neutrons in the nucleus. D) The electron configuration of an atom is a representation of how the electrons are distributed in the atomic orbitals. Show Answer Correct Answer: D) The electron configuration of an atom is a representation of how the electrons are distributed in the atomic orbitals. 34. How many electrons are present in M shell if the atomic number is 20 A) 12. B) 8. C) 18. D) 5. Show Answer Correct Answer: B) 8. 35. ISOTOPE OF FOLLOWING ELEMENT IS USED IN TREATMENT OF GOITRE A) MAGNESIUM. B) COBALT. C) IODINE. D) URANIUM. Show Answer Correct Answer: C) IODINE. 36. The Gold foil Experiment was conducted by A) Eugen Goldstein. B) James Chadwick. C) JJ Thomson. D) Ernest Rutherford. Show Answer Correct Answer: D) Ernest Rutherford. 37. A neutron has ..... charge or is ..... A) Positive neutral. B) No neutral. C) Negative neutral. D) No negative. Show Answer Correct Answer: B) No neutral. 38. Which subatomic particles are found in the nucleus of an atom? A) Protons and Electrons. B) Protons and Neutrons. C) Neutrons and Electrons. D) Protons, Neutrons and Electrons. Show Answer Correct Answer: B) Protons and Neutrons. 39. The symbol for PHOSPHORUS is ..... A) Ph. B) Ps. C) Po. D) P. Show Answer Correct Answer: D) P. 40. An isotope of iodine is used for making tincture iodine, which is used as a medicine. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 41. The meaning of Greek word "atomos" is A) Incomplete. B) Indivisible. C) Cosmos. D) Whole. Show Answer Correct Answer: B) Indivisible. 42. Which of the following transitions are allowed A) N = 5, l = 4, m = 4, s = +1/2. B) N = 2, l = 2, m = 0, s =-1/2. C) N = 1, l = 4, m = 3, s = +1. D) N = 4, l = 0, m =-2, s = +1/2. Show Answer Correct Answer: A) N = 5, l = 4, m = 4, s = +1/2. 43. The part of an atom where nearly whole mass is concentrated is called A) Nucleus. B) Atom. C) Neutron. D) Extra-nuclear part. Show Answer Correct Answer: A) Nucleus. 44. What is the formula for finding the number of electrons present in the shell? A) $2n^2$. B) 2n. C) $2n^3$. D) None of the above. Show Answer Correct Answer: A) $2n^2$. 45. Which of the following electron transitions in the hydrogen atom has the highest frequency? A) N$_{3 }$to n$_{1}$. B) N$_{7 }$to n$_{2}$. C) N$_{4 }$to n$_{2}$. D) N$_{5 }$to n$_{3}$. Show Answer Correct Answer: A) N$_{3 }$to n$_{1}$. 46. What is the symbol for CALCIUM? A) C. B) Ca. C) Cl. D) Cm. Show Answer Correct Answer: B) Ca. 47. What is the electrical charge of the nucleus? A) Positive. B) Negative. C) Neutral. D) All of the above. Show Answer Correct Answer: A) Positive. 48. To which electrode is cathode attached A) Negative Terminal. B) Positive Terminal. C) None. D) None of the above. Show Answer Correct Answer: A) Negative Terminal. 49. JJ Thomson proved that the ray's originating from the cathode are made up of ..... A) Charge less particle. B) Positrons. C) Positively charged particle. D) Negatively charged particles. Show Answer Correct Answer: D) Negatively charged particles. 50. The postulates of Dalton's Atomic Theory did not satisfy A) Isotopes. B) Isobars. C) The fact that atom is divisible. D) All of these. Show Answer Correct Answer: D) All of these. 51. Particles are packed tightest in a A) Solid. B) Liquid. C) Gas. D) Plasma. Show Answer Correct Answer: A) Solid. 52. Which electromagnetic waves have the highest frequencies and the shortest wavelengths? A) Microwaves. B) Visible light. C) Gamma rays. D) None of the above. Show Answer Correct Answer: C) Gamma rays. 53. "Energy Levels" = ..... A) Groups. B) Atoms. C) Elements. D) Periods. Show Answer Correct Answer: D) Periods. 54. The second electron shell can old how many electrons? A) 8. B) 4. C) 2. D) 6. Show Answer Correct Answer: A) 8. 55. S, p, d, f are representation of which quantum number A) S. B) M. C) N. D) L. Show Answer Correct Answer: D) L. 56. What is the electrical property of some objects that determines whether the object is positive, negative, or neutral? A) Density. B) Mass. C) Atom. D) Charge. Show Answer Correct Answer: D) Charge. 57. How many unpaired electrons does an atom of chromium contain A) 6. B) 5. C) 2. D) 7. Show Answer Correct Answer: A) 6. 58. A positively charged particle in the nucleus of an atom is a ..... A) Electron. B) Neutron. C) Proton. D) None of the above. Show Answer Correct Answer: C) Proton. 59. Which experiment led to the discovery of the nucleus in an atom? A) Rutherford's Gold Foil Experiment. B) Thomson's Cathode Ray Experiment. C) Millikan's Oil Drop Experiment. D) Bohr's Hydrogen Spectrum Experiment. Show Answer Correct Answer: A) Rutherford's Gold Foil Experiment. 60. What is the electrical charge of a neutron? A) Positive. B) Negative. C) Netural. D) All of the above. Show Answer Correct Answer: C) Netural. ← 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