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 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The one or two letters used to represent an element is its A) Element symbol. B) Element name. C) Atomic mass. D) Atomic number. Show Answer Correct Answer: A) Element symbol. 2. There are four elements P, Q, R and S having atomic numbers of 4, 18, 10 and 16 respectively. The elementwhich can exhibit covalency as well as electrovalency will be: A) P. B) S. C) R. D) Q. Show Answer Correct Answer: B) S. 3. For which one of the following Bohr's Model is NOT valid? A) He$^{+}$. B) Hydrogen atom. C) Deuteron atom($^{2}$H). D) Ne$^{+}$. Show Answer Correct Answer: D) Ne$^{+}$. 4. The Atomic Theory was proposed by the scientist A) JJ Thomson. B) John Dalton. C) Michael Faraday. D) E. Rutherford. Show Answer Correct Answer: B) John Dalton. 5. Thomson proposed that- "An atom consists of a positively charged sphere and the electrons are embedded in it" . A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 6. N is the symbol for the element ..... A) Neon. B) Nitrogen. C) Sodium. D) Nickel. Show Answer Correct Answer: B) Nitrogen. 7. Lightest particle is A) Electron. B) Neutron. C) Proton. D) None of these. Show Answer Correct Answer: A) Electron. 8. What determines an element's chemical reactivity? A) The number of valence electrons. B) The number of electrons. C) The number of neutrons. D) The number of protons. Show Answer Correct Answer: A) The number of valence electrons. 9. The number of fundamental particles in an atom of the lightest isotope carbon are A) 6. B) 20. C) 18. D) 12. Show Answer Correct Answer: D) 12. 10. Adding or subtracting neutrons (charge = 0, mass = 1) makes the element change into an ..... A) Ion. B) Isotope. C) Mixture. D) Neutral atom. Show Answer Correct Answer: B) Isotope. 11. Which would be the electrical charge on a sulphur atom containing 18 electrons? A) 0. B) 2+. C) 1-. D) 2-. Show Answer Correct Answer: D) 2-. 12. What is the symbol for Mass Number, Atomic Number and element? A) Mass No. = ZAtomic No. = X Element = A. B) Mass No. = XAtomic No. = ZElement = A. C) Mass No. = AAtomic No. = XElement = Z. D) Mass No. = AAtomic No. = ZElement = X. Show Answer Correct Answer: D) Mass No. = AAtomic No. = ZElement = X. 13. Atomic number of last noble gas A) 118. B) 86. C) 120. D) 108. Show Answer Correct Answer: A) 118. 14. How many electrons, protons and neutrons will be present in X$^{-}$, if atomic number of X is 9 and mass number is 19? A) E = 10, P = 10, N = 10. B) E = 10, P = 9, N = 10. C) E = 9, P = 9, N = 10. D) E = 9, P = 10, N = 10. Show Answer Correct Answer: B) E = 10, P = 9, N = 10. 15. Atoms of different elements with different atomic numbers, which have the same mass number, are known as A) Isotopes. B) Isotopa. C) Isobars. D) Isolation. Show Answer Correct Answer: C) Isobars. 16. What particle was used in the gold foil experiment? A) Alpha particle. B) High energy electron. C) Beta Particle. D) Gamma ray. Show Answer Correct Answer: A) Alpha particle. 17. Strontium was first isolated by ..... A) James Chadwick. B) Marie Curie. C) Sir Humphry Davy. D) Michael Faraday. Show Answer Correct Answer: C) Sir Humphry Davy. 18. What is unique about the number of neutrons in a normal hydrogen atom? A) It does not have any neutrons. B) It has more neutrons than protons. C) It has an equal number of neutrons and protons. D) It has an equal number of neutrons and electrons. Show Answer Correct Answer: A) It does not have any neutrons. 19. An element with a mass number of 12 and an atomic number of 6 has how many protons? A) 8. B) 5. C) 6. D) 10. Show Answer Correct Answer: C) 6. 20. Rutherford's $\alpha$-particle scattering experiment showed that (i) electrons have negative charge (ii) the mass and positive charge of the atom is concentrated in the nucleus (iii) neutron exists in the nucleus (iv) most of the space in atom is empty Which of the above statements are correct? A) (i) and (iii). B) (ii) and (iv). C) (i) and (iv). D) (iii) and (iv). Show Answer Correct Answer: B) (ii) and (iv). 21. Formula for finding the No. of Neutrons = A) Mass Number-No. of Protons. B) Mass Number + Atomic Number. C) Atomic Number-Mass Number. D) Mass Number-Atomic Number. Show Answer Correct Answer: D) Mass Number-Atomic Number. 22. The pair of ions having same electronic configuration is ..... A) Fe$^{+3}$, Mn$^{+2}$. B) Fe$^{+3}$, Co$^{+3}$. C) Sc $^{+3}$, Cr$^{+3}$. D) Cr$^{+3}$, Fe$^{+3}$. Show Answer Correct Answer: A) Fe$^{+3}$, Mn$^{+2}$. 23. D atom have 12 protons. Which group and period does element D belong to in periodic table? A) Group 2, Period 3. B) Group 12, Period 13. C) Group 12, Period 3. D) Group 2, Period 13. Show Answer Correct Answer: A) Group 2, Period 3. 24. What is the energy order of orbitals in Aufbau principle? A) 1s < 2s < 2p < 3s < 3p < 3d < 4s. B) 1s < 2s < 2p < 3s < 3p < 4s < 3d. C) 1s < 2s < 2p < 3s < 3p < 3d < 4s < 4p. D) 1s < 2s < 2p < 3s < 3p < 3d < 4p. Show Answer Correct Answer: B) 1s < 2s < 2p < 3s < 3p < 4s < 3d. 25. Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order (i) Rutherford's atomic model (ii) Thomson's atomic model (iii) Bohr's atomic model A) (i), (ii) and (iii). B) (ii), (iii) and (i). C) (ii), (i) and (iii). D) (iii), (ii) and (i). Show Answer Correct Answer: C) (ii), (i) and (iii). 26. The proton number of an element X is 28. The Y$^{2+}$ ion is isoelectronic with X. Which of the following combination is correct? A) X$^{2+}$ = 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d$^{10}$. B) X = 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d$^{10}$. C) Y$^{2+}$ = 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d$^{10}$. D) Y = 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d$^{10}$. Show Answer Correct Answer: C) Y$^{2+}$ = 1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$3d$^{10}$. 27. Which quantum number determines the shape of orbitals? A) N. B) M. C) L. D) S. Show Answer Correct Answer: A) N. 28. In J J Thomson model A) The seeds are electrons. B) The seeds are protons. C) The seeds are negative rays. D) The seeds are cathode rays. Show Answer Correct Answer: A) The seeds are electrons. 29. The center of an atom, usually made of protons and neutrons A) Proton. B) Nucleus. C) Atomic Number. D) Isotope. Show Answer Correct Answer: B) Nucleus. 30. ARGON AND CALCIUM ARE PAIR OF A) ISOBARS. B) ISOTOPES. C) ISOTONES. D) ISOMERS. Show Answer Correct Answer: A) ISOBARS. 31. ..... were not present in Thomson's model A) Protons. B) Protons and Electrons. C) Electrons. D) Neutrons. Show Answer Correct Answer: D) Neutrons. 32. Number of unpaired electrons in N2+ A) 1. B) 0. C) 2. D) 3. Show Answer Correct Answer: A) 1. 33. If the value of azimuthal quantum number of an electron is 2, then which of the following values of magnetic quantum numbers is not permissible A) 2. B) 1. C) 0. D) 3. Show Answer Correct Answer: D) 3. 34. What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10m/s A) 6.67X10$^{-34}$m. B) 6.67X10$^{-25}$m. C) 6.67X10$^{-27}$m. D) 300nm. Show Answer Correct Answer: A) 6.67X10$^{-34}$m. 35. What is the electrical charge of an electron? A) Positive. B) Negative. C) Neutral. D) All of the above. Show Answer Correct Answer: B) Negative. 36. He developed the planetary model of the atom. A) Dalton. B) Chadwick. C) Rutherford. D) Bohr. Show Answer Correct Answer: C) Rutherford. 37. What did further experiments by Rutherford identify in the nucleus? A) Electrons. B) Neutrons. C) Protons. D) Orbiting electrons. Show Answer Correct Answer: C) Protons. 38. Electron in an excited state, may return to ground state by emitting energy during its transmission. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 39. Calculate mass of a photon with wavelength 3.6 angstrom A) 6.2X10$^{-29}$gm. B) 6.2gm. C) 6.2X10$^{-29}$kg. D) 6.2X10$^{-35}$kg. Show Answer Correct Answer: C) 6.2X10$^{-29}$kg. 40. The symbol for MAGNESIUM is ..... A) Mm. B) Mg. C) M. D) Ma. Show Answer Correct Answer: B) Mg. 41. Which of the following set of quantum numbers is not valid? A) 2, 1, 1, 1/2. B) 2, 1, 0, 1/2. C) 2, 0, 1, 1/2. D) 2, 0, 0, 1/2. Show Answer Correct Answer: C) 2, 0, 1, 1/2. 42. Which of the following is the correct electronic configuration of sodium? A) 2, 1, 8. B) 8, 2, 1. C) 2, 8, 2. D) 2, 8, 1. Show Answer Correct Answer: D) 2, 8, 1. 43. An atom is electrically neutral when A) Protons and neutrons are the same. B) Protons and electrons are the same. C) Neutrons and electrons are the same. D) Neutrons balance the protons and electrons. Show Answer Correct Answer: B) Protons and electrons are the same. 44. For which of the following species, Bohr's theory is not applicable? A) Be 3+. B) He 2+. C) H. D) Li 2+. Show Answer Correct Answer: A) Be 3+. 45. Shape of the orbital is given by ..... A) Principle Quantum Number. B) Spin Quantum Number. C) Magnetic Quantum Number. D) Azimuthal Quantum Number. Show Answer Correct Answer: D) Azimuthal Quantum Number. 46. What is the shape of p orbitals? A) Hexagonal. B) Triangular. C) Dumbbell. D) Spherical. Show Answer Correct Answer: D) Spherical. 47. If r is the radius of first orbit, the radius of n$^{th }$orbit of the H atom will be A) R n. B) R$^{2}$n $^{2 }$. C) R/n. D) R n $^{2}$. Show Answer Correct Answer: D) R n $^{2}$. 48. S is the symbol for the element ..... A) Silver. B) Sulfur. C) Sodium. D) Silicon. Show Answer Correct Answer: B) Sulfur. 49. The uncertainties in the velocity of two particles A and B are 0.05 and 0.02 ms respectively. Themass of B is five times to that of A. The ratio of uncertainties in their positions is: A) 0.25. B) 2. C) 1. D) 4. Show Answer Correct Answer: B) 2. 50. The atomic particle with no charge is the ..... A) Electron. B) Neutron. C) Proton. D) Nucleus. Show Answer Correct Answer: B) Neutron. 51. The maximum number of electrons that can be accommodated in a sublevel for which l = 3 is: A) 14. B) 2. C) 10. D) 4. Show Answer Correct Answer: A) 14. 52. An atom of a certain element has 36 protons, 36 electrons, and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom? A) 36. B) 72. C) 48. D) 84. Show Answer Correct Answer: C) 48. 53. This subatomic particle has a positive charge. A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: A) Proton. 54. Which of the following has wavelengths longer than microwaves? A) Infrared waves. B) Radio waves. C) Visible light. D) None of the above. Show Answer Correct Answer: B) Radio waves. 55. Naturally occurring rubidium consists of just two isotopes. One of the isotopes consists of atoms having a mass of 84.912 amu; the other of 86.901 amu. What is the percent natural abundance of the heavier isotope? A) 28%. B) 72%. C) 15%. D) 37%. Show Answer Correct Answer: A) 28%. 56. Found in the nucleus of an atom. This particle has a positive charge. A) Neutron. B) Electron. C) Decepticon. D) Proton. Show Answer Correct Answer: D) Proton. 57. Carbon-12 atom has ..... A) 6 electrons, 12 protons, 6 neutrons. B) 12 electrons, 6 protons, 6 neutrons. C) 6 electrons, 6 protons, 6 neutrons. D) 18 electrons, 6 protons and 6 neutrons. Show Answer Correct Answer: C) 6 electrons, 6 protons, 6 neutrons. 58. If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom? A) 12 neutrons. B) 12 electrons. C) 12 protons. D) 24 protons and neutrons. Show Answer Correct Answer: B) 12 electrons. 59. When alpha particles are projected on Beryllium, then A) Electrons are emitted. B) Protons are emitted. C) Neutrons are emitted. D) None of these. Show Answer Correct Answer: C) Neutrons are emitted. 60. Symbol of electron A) E-. B) E. C) All the above. D) None of the above. Show Answer Correct Answer: A) E-. ← 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 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