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 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 10 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. All lanthanoids belong to group A) 3. B) 4. C) 16. D) 5. Show Answer Correct Answer: A) 3. 2. The charge to mass ratio (specific charge) of an electron is A) -1.76 x 10$^{13}$ C/kg. B) -1.76 x 10$^{10}$ C/kg. C) -1.76 x 10$^{11}$ C/kg. D) -1.76 x 10$^{12}$ C/kg. Show Answer Correct Answer: C) -1.76 x 10$^{11}$ C/kg. 3. If an atom has an equal amount of protons and electrons, what will its' charge be? A) Negative. B) Positive. C) Neutral. D) Infinite. Show Answer Correct Answer: C) Neutral. 4. What will always be true of an atom of iron (Fe)? A) 56 electrons. B) 26 neutrons. C) 26 protons. D) 30 electrons. Show Answer Correct Answer: C) 26 protons. 5. Assertion (A):All isotopes of a given element show the same type of chemical behaviour.Reason (R):The chemical properties of an atom are controlled by the number of electrons in the atom. A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false R is true. Show Answer Correct Answer: A) Both A and R are true and R is the correct explanation of A. 6. Which subatomic particle has much less mas than the other two? A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: C) Electron. 7. Who proposed that electrons move around the nucleus in circular orbits? A) Bohr. B) Rutherford. C) Dalton. D) Thomson. Show Answer Correct Answer: A) Bohr. 8. The ratio of the masses of oxygen that combines with 2 g of Hydrogen in Hydrogen Peroxide and water is $\frac{2}{1}$ A) Law of multiple proportions. B) Law of reciprocal proportions. C) Law of definite proportions. D) Law of conservation of mass. Show Answer Correct Answer: A) Law of multiple proportions. 9. Which scientist is responsible for first stating that all the atoms of a particular element are identical but are different from the atoms of all other elements? A) Democritus. B) Thomson. C) Proust. D) Dalton. E) Aristotle. Show Answer Correct Answer: D) Dalton. 10. An atom that is diamagnetic is A) An atom with all paired electrons. B) An atom with unpaired electrons. C) Both. D) None of the above. Show Answer Correct Answer: A) An atom with all paired electrons. 11. Number of valence electrons in Cl-ion are: A) 8. B) 18. C) 16. D) 17. Show Answer Correct Answer: A) 8. 12. Where does the mass of an atom come from? A) Protons and neutrons inside the nucleus. B) Protons and neutrons outside the nucleus. C) Protons and electrons inside the nucleus. D) Protons and electrons outside the nucleus. Show Answer Correct Answer: A) Protons and neutrons inside the nucleus. 13. The radius of electron's second stationary orbit in Bohr's atom is R . The radius of the third orbit will be A) 9 R. B) 2.25 R. C) 3R. D) R/3. Show Answer Correct Answer: B) 2.25 R. 14. Who discovered the nucleus using the gold foil experiment? A) James Chadwick. B) Democritus. C) Robert Millikan. D) Ernest Rutherford. Show Answer Correct Answer: D) Ernest Rutherford. 15. Which of the following is not the subatomic particle in the atom? A) Neutrons. B) Electrons. C) Nucleus. D) Protons. Show Answer Correct Answer: C) Nucleus. 16. Energy of electron in first orbit of Hydrogen A) 2.18 x 10$^{18}$. B) -2.18 x 10$^{18}$. C) 2.18 x 10$^{-18}$. D) -2.18 x 10$^{-18}$. Show Answer Correct Answer: D) -2.18 x 10$^{-18}$. 17. Which of the following is not a sub-atomic particle? A) Nucleus. B) Proton. C) Neutron. D) Electron. Show Answer Correct Answer: A) Nucleus. 18. The size and energy of the orbital is given by ..... quantum number A) Magnetic. B) Principle. C) Subsidary. D) Spin. Show Answer Correct Answer: B) Principle. 19. How many electrons are present in 1 mole of H$_{2}$O A) 3 X 6.022 X 10$^{23}$. B) 6.022 X 10$^{24}$. C) 3 X 6.022 X 10$^{24}$. D) 3 X 6.022 X 10$^{22}$. Show Answer Correct Answer: C) 3 X 6.022 X 10$^{24}$. 20. If frequency required for transition of electron from 2$^{nd}$ orbit to 5$^{th}$ orbit is 4 x 10$^{15}$ Hz, the energy absorbed during the transition is ..... A) 16.5 e V. B) 16.5 J. C) 26.5 J. D) 26.5 e V. Show Answer Correct Answer: A) 16.5 e V. 21. Electronic configuration of atom with atomic number 19 is A) 2, 7, 11. B) 2, 8, 8. C) 2, 8, 9. D) 2, 8, 8, 1. Show Answer Correct Answer: D) 2, 8, 8, 1. 22. What is Pauli Exclusion Principle? A) No 2 electrons have same 4 quantum numbers. B) Placeholder. C) Two electrons in nucleus. D) None of the above. Show Answer Correct Answer: A) No 2 electrons have same 4 quantum numbers. 23. The distance from one point to the next corresponding point on a wave is called the ..... A) Peak. B) Amplitude. C) Waveform. D) Wavelength. Show Answer Correct Answer: D) Wavelength. 24. Which of the following represents the correct electron distribution in magnesium ion? A) 2, 8, 3. B) 2, 8, 2. C) 2, 8. D) 2, 8, 1. Show Answer Correct Answer: C) 2, 8. 25. What causes fine structure in spectra? A) Nuclear charge. B) Spin-orbit coupling. C) Energy difference. D) Energy splitting. Show Answer Correct Answer: B) Spin-orbit coupling. 26. An atom has 10 protons and a mass of 18. It has ..... neutrons A) 10. B) 8. C) 28. D) 18. Show Answer Correct Answer: B) 8. 27. Alpha particle is the nucleus of A) Lithium. B) Helium. C) Berylium. D) Hydrogen. Show Answer Correct Answer: B) Helium. 28. Removing electrons from an atom makes a(n) A) Isotope. B) New element. C) Negative ion. D) Positive ion. Show Answer Correct Answer: D) Positive ion. 29. What is the mass per unit volume of a substance called? A) Charge. B) Atom. C) Mass. D) Density. Show Answer Correct Answer: D) Density. 30. Which of the following atom has maximum number of unpaired electrons? A) Cu(29). B) Cr(24). C) Zn(30). D) Mn(25). Show Answer Correct Answer: B) Cr(24). 31. A negatively charged particle that occupies the space in an atom outside the nucleus is an ..... A) Electron. B) Neutron. C) Proton. D) None of the above. Show Answer Correct Answer: A) Electron. 32. Which particles are positively charged and located in the nucleus of an atom? A) Atom. B) Neutron. C) Proton. D) Mass. Show Answer Correct Answer: C) Proton. 33. True or False:An atom's electron cloud is located in the region surrounding the nucleus. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 34. Which of the following species is not isoelectronic with Ne A) Mg$^{2+}$. B) Na$^{+}$. C) Na. D) Al$^{3+}$. Show Answer Correct Answer: C) Na. 35. Assertion (A):It is impossible to determine the exact position and exact momentum of an electron simultaneously.Reason (R):The path of an electron in an atom is clearly defined. A) Both A and R are true and R is the correct explanation of A. B) Both A nd R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false but R is true. Show Answer Correct Answer: C) A is true but R is false. 36. Which of the following quantum numbers governs the spatial orientation of an atomic orbital? A) Azimuthal quantum number. B) Principal quantum number. C) Spin quantum number. D) Magnetic quantum number. Show Answer Correct Answer: D) Magnetic quantum number. 37. Orbital sublevels, or L, represents: A) Orbital color. B) Orbital shape. C) Electron spin. D) Energy level. Show Answer Correct Answer: B) Orbital shape. 38. What is the total number of orbitals associated with the principal quantum number n = 4? A) 8. B) 12. C) 16. D) 10. Show Answer Correct Answer: C) 16. 39. The charge on an electron is A) 1.602 x 10$^{19 }$C. B) 1.602 x 10$^{-19 }$C. C) -1.602 x 10$^{-19 }$C. D) -1.602 x 10$^{19 }$C. Show Answer Correct Answer: C) -1.602 x 10$^{-19 }$C. 40. An atom is electrically neutral because of the presence of equal number of A) Protons and electrons. B) Protons and neutrons. C) Neutrons and electrons. D) All of these. Show Answer Correct Answer: A) Protons and electrons. 41. Select the incorrect statement about Cathode rays A) The charge to mass ratio of cathode rays does not depend on the nature of gas. B) Cathode rays travel in straight lines in absence of electric and magnetic field. C) Cathode rays move towards the anode. D) Cathode rays consist of positively charged gaseous ions. Show Answer Correct Answer: D) Cathode rays consist of positively charged gaseous ions. 42. The atom has 24 atomic mass and 14 neutrons. How many electron does it have. A) 10. B) 14. C) 12. D) 24. Show Answer Correct Answer: A) 10. 43. How many orbitals can have the following set of quantum numbers, n = 3, l = 1, m1 = 0? A) 4. B) 3. C) 2. D) 1. Show Answer Correct Answer: D) 1. 44. Who first proposed the atomic theory on a scientific basis? A) J.J. Thomson. B) Niels Bohr. C) Ernest Rutherford. D) John Dalton. Show Answer Correct Answer: D) John Dalton. 45. What is the significance of principal quantum number? A) Chemical bonding. B) 105 pm. C) Size & energy level. D) 25 pm. Show Answer Correct Answer: C) Size & energy level. 46. JJ Thomson found that the cathode ray tubes were ..... because they were attracted to the positive plate of an external electric field. A) Positive. B) Negative. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Negative. 47. Who stated that atoms are indivisible A) Neils Bhor. B) John Dalton. C) E. Rutherford. D) J . J Thomson. Show Answer Correct Answer: B) John Dalton. 48. WHAT HAPPENS TO THE ATOMIC NO DURING A CHEMICAL REACTION? A) IT INCREASES. B) CHANGES ALTERNATIVELY. C) IT DECREASES. D) REMAINS SAME. Show Answer Correct Answer: D) REMAINS SAME. 49. The different orbits or energy levels of an atom according to Bohr Model are called A) Energy levels. B) Stationary states. C) Excited states. D) Ground state. Show Answer Correct Answer: B) Stationary states. 50. An atom of a certain element has 19 protons, 19 electrons, and a mass number of 39. At room temperature this element is not a very stable. How many neutrons are in this atom? A) 84. B) 72. C) 36. D) 20. Show Answer Correct Answer: D) 20. 51. The ..... of an atom is the sum of the protons and neutrons in the nucleus of that atom. A) Isotope weight. B) Atomic number. C) Atomic weuight. D) Mass number. Show Answer Correct Answer: D) Mass number. 52. 1Assertion (A):Black body is an ideal body that emits and absorbs radiations of all frequencies.Reason (R):The frequency of radiation emitted by a body goes from a lower frequency to higher frequency with an increase in temperature. A) Both A and R are true and R is the correct explanation of A. B) Both A nd R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false but R is true. Show Answer Correct Answer: B) Both A nd R are true but R is not the correct explanation of A. 53. What does the atomic number (Z) represent? A) Number of protons. B) Total number of nucleons. C) Number of electrons in an ion. D) Number of neutrons. Show Answer Correct Answer: A) Number of protons. 54. What is the difference between the number of electrons in an atom of Selenium (Se) which has an atomic number of 34, and the number of electrons in an atom of Aluminum (Al) which has an atomic number of 13 A) There is no difference. B) 21. C) There is not enough information to answer this question. D) 47. Show Answer Correct Answer: B) 21. 55. Electronic configuration of Neon A) 1s$^{2}$ 2s$^{0}$ 2p$^{6}$. B) 1s$^{1}$ 2s$^{2}$ 2p$^{6}$. C) 1s$^{2}$ 2s$^{2}$ 2p$^{6}$. D) 1s$^{1}$ 2s$^{1}$ 2p$^{6}$. Show Answer Correct Answer: C) 1s$^{2}$ 2s$^{2}$ 2p$^{6}$. 56. Which of the following atoms would have a mass number of 27? A) 13 protons, 14 neutrons, 13 electrons. B) 23 protons, 27 neutrons, 23 electrons. C) 9 protons, 10 neutrons, 9 electrons. D) 27 protons, 32 neutrons, 27 electrons. Show Answer Correct Answer: A) 13 protons, 14 neutrons, 13 electrons. 57. The proper pair of the L value with the orbital shape. A) 0; f. B) 1; s. C) 2; d. D) 3; p. Show Answer Correct Answer: C) 2; d. 58. Which subatomic particle has a negative charge? A) Proton. B) Electron. C) Neutron. D) Positron. Show Answer Correct Answer: B) Electron. 59. The most element in the earth's crust is A) Oxygen. B) Nitrogen. C) Silicon. D) None of the above. Show Answer Correct Answer: A) Oxygen. 60. Smallest energy shell is? A) L. B) N. C) M. D) K. Show Answer Correct Answer: D) K. ← 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