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 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 11 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The mass number of an element is the number of A) Protons and electrons. B) Protons. C) Electrons and neutrons. D) Protons and neutrons. Show Answer Correct Answer: D) Protons and neutrons. 2. What is a pure substance made of one kind of atom called? A) Element. B) Isotope. C) Ion. D) Compound. Show Answer Correct Answer: A) Element. 3. Which particle has a positive charge A) Proton. B) Electron. C) Nucleon. D) Neutron. Show Answer Correct Answer: A) Proton. 4. 19-Which of the reactions will need the maximum amount of energy? A) Ca$^{+}$ $\rightarrow$ Ca$^{2+}$ + e$^{-}$. B) Na $\rightarrow$ Na$^{+}$ + e$^{-}$. C) K$^{+}$ $\rightarrow$ K$^{2+}$ + e$^{-}$. D) Al$^{2+}$ $\rightarrow$ Al$^{3+}$ + e$^{-}$. Show Answer Correct Answer: C) K$^{+}$ $\rightarrow$ K$^{2+}$ + e$^{-}$. 5. Magnetic moment of N A) 0. B) Square root of 15. C) Suarez root of 3. D) Square root of 8. Show Answer Correct Answer: B) Square root of 15. 6. The radii of Bohr orbit are directly proportional to ..... A) Principal quantum number. B) Cube of principal quantum number. C) Square of principal quantum number. D) Independent of principal quantum number. Show Answer Correct Answer: C) Square of principal quantum number. 7. Give designation to an electron having following set of quantum numbersn=3, l=2 A) 2p. B) 3s. C) 2d. D) 3d. Show Answer Correct Answer: D) 3d. 8. Select the incorrect statement about anode rays A) Anode rays are positively charged gaseous ions. B) The charge to mass ratio of anode rays does not depend on the nature of gas. C) Anode rays travel towards cathode. D) Anode rays travel in straight lines in the absence of electric and magnetic field. Show Answer Correct Answer: B) The charge to mass ratio of anode rays does not depend on the nature of gas. 9. A proton is ..... A) A negatively charged subatomic particle. B) A positively charged subatomic particle. C) A neutrally charged subatomic particle. D) The only subatomic particle located in the nucleus. Show Answer Correct Answer: B) A positively charged subatomic particle. 10. Which of the following is not a property of cathode rays? A) They travel in straight lines. B) They get deflected towards the negative plate in an electric field. C) They move in a circular manner if a perpendicular magnetic field is applied. D) They possess kinetic energy. Show Answer Correct Answer: B) They get deflected towards the negative plate in an electric field. 11. K SHELL-2, L SHELL-7, M SHELL-2 IS ELECTRONIC CONFIGURATION OF: A) HYDROGEN. B) SODIUM. C) MAGNESIUM. D) NONE. Show Answer Correct Answer: D) NONE. 12. Who discovered electron A) E Goldstein. B) Bohr. C) J J Thomson. D) Rutherford. Show Answer Correct Answer: C) J J Thomson. 13. What is maximum number of possible lines formed for all the transitions involving the first six energy levels in the emission spectrum for the hydrogen atom? A) 15. B) 6. C) 5. D) 11. Show Answer Correct Answer: A) 15. 14. The symbol for ALUMINUM is ..... A) An. B) A. C) Al. D) Am. Show Answer Correct Answer: C) Al. 15. An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atom's nucleus? A) +25. B) +30. C) -25. D) -30. Show Answer Correct Answer: A) +25. 16. Which of the following orbital have dumbell shape A) P. B) S. C) F. D) D. Show Answer Correct Answer: A) P. 17. Which of the following has variable valency? A) Sodium. B) Potassium. C) Iron. D) None of the above. Show Answer Correct Answer: C) Iron. 18. Most of the atom is filled with A) Empty space. B) Electrons. C) Protons. D) The nucleus. Show Answer Correct Answer: A) Empty space. 19. In the Bohr model of the atom, electrons orbit the nucleus in specific paths. What are these paths called? A) Shells. B) Levels. C) Clouds. D) Orbits. Show Answer Correct Answer: A) Shells. 20. The isotope C-12 is present in abundance A) 96.9%. B) 98.9%. C) 99.7%. D) None of these. Show Answer Correct Answer: B) 98.9%. 21. Which subatomic particle was discovered by James Chadwick? A) Positron. B) Proton. C) Electron. D) Neutron. Show Answer Correct Answer: D) Neutron. 22. Which of the following has six valence electrons? A) Iodine. B) Neon. C) Sodium. D) Oxygen. Show Answer Correct Answer: D) Oxygen. 23. Protons and neutrons are made up of A) Quarks. B) Antineutrinos. C) Neutrinos. D) Muon. Show Answer Correct Answer: A) Quarks. 24. What does the mass number of an element represent? A) The number of protons in an atom. B) The number of neutrons in an atom. C) The number of electrons in an atom. D) The number of protons and neutrons in an atom. Show Answer Correct Answer: D) The number of protons and neutrons in an atom. 25. What is the valency of an atom with an electron configuration of $1s^2 2s^2 2p^6 3s^2 3p^5$ A) 2. B) 1. C) 3. D) 7. Show Answer Correct Answer: B) 1. 26. The nucleus of the atom contains 8 protons and 9 neutrons. The atom is electrically neutral. How many electrons does this atom have? A) 9. B) 8. C) 15. D) 4. Show Answer Correct Answer: B) 8. 27. How many total orbitals are in 4f subshell? A) 9. B) 5. C) 7. D) 14. Show Answer Correct Answer: A) 9. 28. TYPE OF ION FORMED BY ALUMINIUM IS: A) AL2+. B) AL3+. C) AL2-. D) AL3-. Show Answer Correct Answer: B) AL3+. 29. Which statement is accurate regarding subatomic particles? A) Electrons are the heaviest particle, with a positive charge. B) Protons and electrons are equal in mass with positive charges. C) Electrons are neutral with the least mass. D) Protons have a positive charge with a mass of 1 amu and neutrons are neutral with the same mass as a proton. Show Answer Correct Answer: D) Protons have a positive charge with a mass of 1 amu and neutrons are neutral with the same mass as a proton. 30. Which subatomic particle does not have an electrical charge and is found inside of the nucleus? A) Electrons. B) Protons. C) Neutrons. D) Isotopes. Show Answer Correct Answer: C) Neutrons. 31. When an atom is chemically stable, how many electrons are in its outer energy level? A) 4 or 8. B) 1 or 2. C) 3 or 6. D) 2 or 8. Show Answer Correct Answer: D) 2 or 8. 32. In 2p$^{3}$ the subshell value is A) 2. B) 0. C) 3. D) 1. Show Answer Correct Answer: D) 1. 33. What does Zeeman effect refer to? A) Splitting in magnetic field. B) Splitting in electric field. C) Transition energy. D) Photon emission. Show Answer Correct Answer: A) Splitting in magnetic field. 34. An orbital can have a maximum of two electrons and these must have opposite spins.above statement may be the conclusion of which law? A) Pauli's exclusion principle. B) Hund's multiplicity rule. C) Aufbau principle. D) N+l rule. Show Answer Correct Answer: A) Pauli's exclusion principle. 35. The isotope used to find out the age of fossils is A) Phosphorus-31. B) Deuterium. C) Carbon-12. D) Carbon-14. Show Answer Correct Answer: D) Carbon-14. 36. Scientist Henrich Geissler in 1857 discovered discharge tube or vacuum tube . His nationality is ..... A) GERMANY. B) AMERICA. C) SPAIN. D) ENGLAND. Show Answer Correct Answer: A) GERMANY. 37. Who discovered the neutron? A) Thomson. B) Chadwick. C) Dalton. D) Bohr. Show Answer Correct Answer: B) Chadwick. 38. What was the name of J.J Thomsons' model of atomic structure. A) Electron Cloud Model. B) Water melon Model. C) Electron Sea Model. D) Bohr Model. Show Answer Correct Answer: B) Water melon Model. 39. Which statement about the atomic nucleus is correct? A) The nucleus is made of protons and neutrons and has a negative charge. B) The nucleus is made of protons and neutrons and has a positive charge. C) The nucleus is made of electrons and has a positive charge. D) The nucleus is made of electrons and has a negative charge. Show Answer Correct Answer: B) The nucleus is made of protons and neutrons and has a positive charge. 40. An ..... is one of two or more different-number-neutron atoms of an element. A) Nucleus. B) Ion. C) Isotopes. D) None of the above. Show Answer Correct Answer: B) Ion. 41. According to which model: ..... An atom consists of a sphere of positive charge with negatively charged electrons embedded in it A) JJ thomson model. B) Rutherford. C) Bohr. D) None. Show Answer Correct Answer: A) JJ thomson model. 42. Isotopes all have the same number of ..... A) Protons. B) Isotope. C) Neutrons. D) Atomic Mass. Show Answer Correct Answer: A) Protons. 43. Select the pair of isotones from following A) $_{6}$C$^{14 }$, $_{6}$C$^{12}$. B) $_{6}$C$^{14 }$, $_{7}$N$^{15}$. C) $_{6}$C$^{14}$, $_{18}$Ar$^{40}$. D) $_{18}$Ar$^{40}$, $_{19}$K$^{40}$. Show Answer Correct Answer: B) $_{6}$C$^{14 }$, $_{7}$N$^{15}$. 44. Rutherford's experiment on scattering of $\alpha$-particle shows that the atom A) Is positively charged. B) Has a very large nucleus. C) Is negatively charged. D) Has a very small positively charged nucleus at the centre. Show Answer Correct Answer: D) Has a very small positively charged nucleus at the centre. 45. What does the nucleus consist of? A) Neutrons + Electrons. B) Atoms. C) Protons + Neutrons. D) Protons + Electrons. Show Answer Correct Answer: C) Protons + Neutrons. 46. What is the valency and valence electrons of Z= 3? A) 1, 0. B) 1, 2. C) 2, 1. D) 1, 1. Show Answer Correct Answer: D) 1, 1. 47. Identify an element with tendency to gain electrons, having three shells and valency 3 A) Phosphorous. B) Alumimium. C) Nitrogen. D) Boron. Show Answer Correct Answer: A) Phosphorous. 48. The maximum no. of electrons that can be accommodated in the outermost shell of an atom is A) 20. B) 2. C) 32. D) 8. Show Answer Correct Answer: D) 8. 49. Which subatomic particles are correctly paired with their charges? A) Electron-neutral, neutron-positive, proton-negative. B) Electron-positive, neutron-negative, proton-neutral. C) Electron-negative, neutron-neutral, proton-positive. D) Electron-negative, neutron-positive, proton-neutral. Show Answer Correct Answer: C) Electron-negative, neutron-neutral, proton-positive. 50. The electromagnetic spectrum includes the complete range of electromagnetic waves placed in order of: A) Increasing amplitutde. B) Increasing wavelength. C) Increasing frequency. D) None of the above. Show Answer Correct Answer: C) Increasing frequency. 51. Consider the first six energy levels of a hydrogen atom. How many electronic transitions corresponding to the Lyman Series and Balmer series are possible? A) Lyman series = 5; Balmer series = 4. B) Lyman series = 6; Balmer series = 6. C) Lyman series = 3; Balmer series = 4. D) Lyman series = 4; Balmer series = 5. Show Answer Correct Answer: A) Lyman series = 5; Balmer series = 4. 52. An atom that has a positive or negative charge is an ..... A) Nucleus. B) Ion. C) Isotopes. D) None of the above. Show Answer Correct Answer: C) Isotopes. 53. The region at the center of an atom's ..... A) Nucleus. B) Ion. C) Isotopes. D) None of the above. Show Answer Correct Answer: A) Nucleus. 54. Identify an element with tendency to lose electrons, having three shells and valency 1. A) Sodium. B) Lithium. C) Potassium. D) Chlorine. Show Answer Correct Answer: A) Sodium. 55. Who suggested the planetary model of atom? A) James Chadwick. B) Michael Faraday. C) Ernest Rutherford. D) JJ Thomson. Show Answer Correct Answer: C) Ernest Rutherford. 56. Ne is the symbol for the element ..... A) Neon. B) Nitrogen$^{}$. C) Nickel. D) Sodium. Show Answer Correct Answer: A) Neon. 57. An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number? A) 10. B) 20. C) 5. D) 25. Show Answer Correct Answer: D) 25. 58. The symbol for the element HELIUM is ..... A) Hm. B) Hl. C) H. D) He. Show Answer Correct Answer: D) He. 59. The nodal plane of p$_{y}$ orbital is A) Zx plane. B) Xy plane. C) Yz plane. D) No nodal plane. Show Answer Correct Answer: A) Zx plane. 60. Ag ..... 110 and Ag ..... 112 are two forms of silver with different mass # so they are A) Neutrons. B) Compounds. C) Isotopes. D) Orbitals. Show Answer Correct Answer: C) Isotopes. ← 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