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 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The subatomic particle called electron was discovered by: A) E. Goldstein. B) Neils Bohr. C) J. J. Thompson. D) James Chadwick. Show Answer Correct Answer: C) J. J. Thompson. 2. An element's atomic number tells how many ..... are in the nucleus of an atom of that element. A) Protons. B) Neutrons. C) Electrons. D) None of the above. Show Answer Correct Answer: A) Protons. 3. ATOM HAS A POSITIVELY CHARGED NUCLEUSTHIS WAS PROPOSED BY SCIENTIST: A) E.GOLDSTEIN. B) NEILS BOHR. C) J.J.THOMSON. D) RUTHERFORD. Show Answer Correct Answer: D) RUTHERFORD. 4. Isotopes of an element have A) Different number of neutrons. B) Different chemical properties. C) Different atomic numbers. D) The same physical properties. Show Answer Correct Answer: A) Different number of neutrons. 5. An alpha particle is also known as:(a) subatomic particle(b) an unionised helium atom(c) a neutral particle(d) a doubly-charged helium ion A) A. B) D. C) B. D) C. Show Answer Correct Answer: B) D. 6. Which of the following has an magnetic moment of 2.83 BM A) Cr3+. B) Mn2+. C) Ti3+. D) Ni2+. Show Answer Correct Answer: D) Ni2+. 7. Which of the following is incorrect about the quantum variable m, or m$_{l}$? A) The value for p is-1, 0, 1. B) When l is 2, there are 5 values for m. C) The value is either +1/2 or-1/2. D) M =-l l. Show Answer Correct Answer: C) The value is either +1/2 or-1/2. 8. What are the three particles that make up the atom? A) Protons, neutrons and isotopes. B) Protons, negatives and electrons. C) Neutrons, isotopes and electrons. D) Protons, neutrons and electrons. Show Answer Correct Answer: D) Protons, neutrons and electrons. 9. What do neutrons most contribute to in an atom? A) Weight. B) Atomic Number. C) Charge. D) Mass. Show Answer Correct Answer: D) Mass. 10. He believed that all matter was continuous and that four basic elements existed (earth, wind, fire, water). A) Thomson. B) Democritus. C) Aristotle. D) Chadwick. Show Answer Correct Answer: C) Aristotle. 11. Why does the proton determine the identity of an atom? A) The number of protons in an atom's nucleus determines an element's atomic number. B) The number of protons determines the atomic mass. C) The number of protons determines chemical properties, such as reactivity. D) The number of protons decides the radioactive properties of an atom. Show Answer Correct Answer: A) The number of protons in an atom's nucleus determines an element's atomic number. 12. ..... are defined as the atoms of the same element, having the same atomic number but different mass numbers A) Isobars. B) Isotopes. C) Isatopes. D) Isopotes. Show Answer Correct Answer: B) Isotopes. 13. What is the mass number?Protons:8Neutrons:8Electrons:8 A) 16. B) 24. C) 8. D) 0. Show Answer Correct Answer: A) 16. 14. What is true of all neutral atoms? A) They have equal numbers of neutrons and electrons. B) They have equal numbers of protons and neutrons. C) They have equal numbers of protons and electrons. D) None of the above. Show Answer Correct Answer: C) They have equal numbers of protons and electrons. 15. Which of the following sets of quantum numbers are correct? n l ml(i) 1 1 +2(ii) 2 1 +1(iii) 3 2-2(iv) 3 4-2 A) (i), (iv). B) (ii), (iv). C) (i), (ii). D) (i), (iii). Show Answer Correct Answer: A) (i), (iv). 16. A neutral atom has an equal number of positive and negative charges. If a neutral Flourine atom has 9 protons and 10 neutrons, how many electrons will it have? A) 7. B) 8. C) 9. D) 10. Show Answer Correct Answer: C) 9. 17. Ca is the symbol for ..... A) Copper. B) Calcium. C) Chlorine. D) Carbon. Show Answer Correct Answer: B) Calcium. 18. 16-An element belongs to period 2 and group 2 $^{th}$ number of valence electrons in the atoms of this element is. A) 3. B) 1. C) 2. D) 4. Show Answer Correct Answer: C) 2. 19. Isotopes have a different what? A) Number of Protons. B) Atomic Number. C) Atomic Mass. D) Number of electrons. Show Answer Correct Answer: C) Atomic Mass. 20. The number of neutrons in $_{82}$Pb$^{207}$ is A) 123. B) 82. C) 85. D) 125. Show Answer Correct Answer: D) 125. 21. What is a substance made of two or more elements called? A) Isotope. B) Ion. C) Element. D) Compound. Show Answer Correct Answer: D) Compound. 22. WHICH OF THE FOLLOWING IS RESPONSIBLE FOR MASS OF AN ATOM A) NO OF PROTONS. B) NO OF ELECTRONS. C) NO OF PROTONS AND NEUTRONS. D) NO OF NEUTRONS. Show Answer Correct Answer: C) NO OF PROTONS AND NEUTRONS. 23. Which of the subatomic particles has relatively no mass A) All have the same mass. B) Protons. C) Neutrons. D) Electrons. Show Answer Correct Answer: D) Electrons. 24. Rutherford's experiment is known as A) The gold foil experiment. B) The copper foil experiment. C) The bronze foil experiment. D) The silver foil experiment. Show Answer Correct Answer: A) The gold foil experiment. 25. A certain atom has 11 electrons and 8 neutrons. What is its atomic mass? A) 19. B) 15. C) 18. D) 11. Show Answer Correct Answer: A) 19. 26. Subatomic particle which has a positive charge is A) Neutron. B) Proton. C) Electron. D) None of the above. Show Answer Correct Answer: B) Proton. 27. Valency of magnesium? A) 1. B) 8. C) 2. D) 12. Show Answer Correct Answer: C) 2. 28. J.J. Thomson proposed that the nucleus of an atom contains only nucleons. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 29. What is it called when two or more of the same element have a different number of neutrons? A) Solution. B) Ion. C) Substance. D) Isotope. Show Answer Correct Answer: D) Isotope. 30. How many protons are in Uranium atom ( at. no.-92) A) 110. B) 56. C) 92. D) 78. Show Answer Correct Answer: C) 92. 31. What is the mass of a proton? A) 1.5 amu. B) 2 amu. C) 1 amu. D) 0 amu. Show Answer Correct Answer: C) 1 amu. 32. Which spectra is known as fingerprint spectra? A) Continuous emission spectra. B) Line emission spectra. C) Absorption spectra. D) None of the above. Show Answer Correct Answer: B) Line emission spectra. 33. The electronic configuration of an element 'Z' is 2, 8, 8. Is 'Z' a metal or a non-metal? A) Metal. B) Non-Metal. C) All the above. D) None of the above. Show Answer Correct Answer: B) Non-Metal. 34. What is the mass of an electron? A) 1.5 amu. B) 2 amu. C) 1 amu. D) 0 amu. Show Answer Correct Answer: D) 0 amu. 35. Electrons travel in a circular path around the nucleus A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 36. What is the energy of an X-ray with a frequency of 1.0 x 10$^{17}$ Hz? A) 1.51 x 10$^{-16 }$J. B) 6.63 x 10$^{-17}$ J. C) 6.63 x 10$^{-34}$ J. D) 1.51 x 10$^{16}$ J. Show Answer Correct Answer: B) 6.63 x 10$^{-17}$ J. 37. Ratio of radius of 4$^{th}$ Bohr's orbit to the 7$^{th}$ orbit is A) 7:4. B) 4:7. C) 16:49. D) 49:16. Show Answer Correct Answer: C) 16:49. 38. The area around the nucleus where elections are located A) Nucleus. B) Electron cloud. C) Borh model. D) Decepticon. Show Answer Correct Answer: B) Electron cloud. 39. Which rule states that orbitals are filled singly first? A) Dalton's Law. B) Pauli Exclusion. C) Hund's Rule. D) Aufbau Principle. Show Answer Correct Answer: C) Hund's Rule. 40. What is the mass of Potassium (K) atom that has 20 neutrons A) 20. B) 39. C) 19. D) 18. Show Answer Correct Answer: B) 39. 41. What is the smallest particle of an element that retains the properties of that element? A) Electron. B) Molecule. C) Atom. D) Proton. Show Answer Correct Answer: C) Atom. 42. Said elements are composed of atoms and different elements have different types of atoms. Elements can combine together to form new things. A) Dalton. B) Thomson. C) Bohr. D) Rutherford. Show Answer Correct Answer: A) Dalton. 43. The electrons of the same orbitals can be distinguished by A) Magnetic quantum number. B) Spin quantum number. C) Azimuthal quantum number. D) Principal quantum number. Show Answer Correct Answer: B) Spin quantum number. 44. Frequency of infrared radiation having wavelength 3X10$^{6}$ nm? A) 10$^{8 }$sec$^{-1}$. B) 10$^{11 }$sec$^{-1}$. C) 10$^{2 }$sec$^{-1}$. D) 10$^{9 }$sec$^{-1}$. Show Answer Correct Answer: B) 10$^{11 }$sec$^{-1}$. 45. What model did J.J. Thompson propose? A) Solid sphere model. B) Plum pudding model. C) Nuclear model. D) Orbital model. Show Answer Correct Answer: B) Plum pudding model. 46. AN ATOM HAS MASS NUMBER 37 AND ATOMIC NO 17.FIND THE NO OF PROTONS A) 17. B) 21. C) 20. D) 22. Show Answer Correct Answer: C) 20. 47. Which of the following sub levels correspond to n=3 l=2l = 0$\rightarrow$n-1 A) 3f. B) 3d. C) 3p. D) 3s. E) 2p. Show Answer Correct Answer: B) 3d. 48. The correct electronic configuration of Pd is A) [Kr]4d$^{9}$5s$^{1}$. B) [Kr]4d$^{8}$5s$^{2}$. C) [Ar]3d$^{10}$4s$^{0}$. D) [Kr]4d$^{10}$5s$^{0}$. Show Answer Correct Answer: D) [Kr]4d$^{10}$5s$^{0}$. 49. Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively: A) 12 and 4. B) 12 and 5. C) 16 and 4. D) 16 and 5. Show Answer Correct Answer: B) 12 and 5. 50. Cathode rays are A) Neutrons. B) Protons. C) Photons. D) Electrons. Show Answer Correct Answer: D) Electrons. 51. A chart that scientists use to organize the elements. A) Periodic Table. B) Atomic Number. C) Name. D) Element. Show Answer Correct Answer: A) Periodic Table. 52. Atoms that have the same number of protons but different numbers of neutrons. A) Isotopes. B) Proton. C) Atomic Mass. D) Neutron. Show Answer Correct Answer: A) Isotopes. 53. Which subatomic particle is responsible for the chemical properties of an atom? A) Electron. B) Nucleus. C) Proton. D) Neutron. Show Answer Correct Answer: A) Electron. 54. What is the electrical charge of a proton? A) 2-. B) 1+. C) 1-. D) Neutral. Show Answer Correct Answer: B) 1+. 55. What are the frequency and the wavelength of radiations in nm when an electron in hydrogen atom jumps from third orbit to the ground state . A) 8.9X 10$^{15}$Hz, 103nm. B) 2.9X 10$^{15}$Hz, 103nm. C) 8.9X 10$^{15}$Hz, 206nm. D) 2.9X 10$^{15}$Hz, 206nm. Show Answer Correct Answer: B) 2.9X 10$^{15}$Hz, 103nm. 56. The scientist who discovered electron is A) J.J. Thomson. B) Marie Curie. C) Albert Einstein. D) James chadwick. Show Answer Correct Answer: A) J.J. Thomson. 57. Which of the following are true for an element?(i) Atomic number = number of protons + number of electrons(ii) Mass number = number of protons + number of neutrons(iii) Atomic mass = number of protons = number of neutrons(iv) Atomic number = number of protons = number of electrons A) (i) and (ii). B) (i) and (iii). C) (ii) and (iii). D) (ii) and (iv). Show Answer Correct Answer: D) (ii) and (iv). 58. What is the momentum of a particle which has a wave length of 2A$^{0}$? A) 3.3 x 10$^{-34}$ kg ms$^{-1}$. B) 13.2 x 10$^{-44}$ kg ms$^{-1}$. C) 3.3 x 10$^{-24}$ kg ms$^{-1}$. D) 3.3 x 10$^{-26}$ kg ms$^{-1}$. Show Answer Correct Answer: C) 3.3 x 10$^{-24}$ kg ms$^{-1}$. 59. The isotope use in the treatment of cancer and tumor is A) Uranium-235. B) Iodine-131. C) Deuterium. D) Phosphorus-31. Show Answer Correct Answer: B) Iodine-131. 60. Which of the following describes what is represented by the symbol Cl$^{-}$? A) A polar molecule. B) An ionic compound. C) A negative ion. D) A positive ion. Show Answer Correct Answer: C) A negative ion. Next →Related QuizzesScience QuizzesClass 11 QuizzesClass 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 8Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books