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 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following statements explains why emission spectrum of hydrogen is a line spectrum? A) Electrons have dual nature. B) The energy levels in the hydrogen atom are quantised. C) The hydrogen has only one electron. D) The lone electron in the hydrogen atom can revolve around the nucleus in fixed orbits only. Show Answer Correct Answer: B) The energy levels in the hydrogen atom are quantised. 2. Describe an Electron Cloud? A) Home of the protons. B) Where electrons are located. C) The mist outside of an atom. D) Nucleus. Show Answer Correct Answer: B) Where electrons are located. 3. Which of the following doesn't relate to rutherford experiment: A) Most of the alpha particles pass straight through the gold foil without any deflection. B) A few alpha particles are deflected through small angles. C) The electrons revolve around the nucleus. D) Very few particles completely rebound. Show Answer Correct Answer: C) The electrons revolve around the nucleus. 4. Which two subatomic particles can be found in the nucleus of an atom? A) Ribosomes and endoplasmic reticulum. B) Neutrons and protons. C) Electrons and protons. D) Protons and alpha particles. Show Answer Correct Answer: B) Neutrons and protons. 5. The maximum kinetic energy of photoelectrons ejected from a metal, when it is irradiated with radiation of frequency 2 x 10$^{14}$ s$^{-1 }$is 6.63 x 10$^{-20}$ J. The threshold frequency of the metal is A) 2 x 10$^{-14}$ s$^{-1}$. B) 3 x 10$^{14}$ s$^{-1}$. C) 1 x 10$^{14}$ s$^{-1}$. D) 1 x 10$^{-14}$ s$^{-1}$. Show Answer Correct Answer: C) 1 x 10$^{14}$ s$^{-1}$. 6. Most of the mass in an atom is made up of ..... ? A) Protons and electrons. B) Protons and neutrons. C) Neutrons and electrons. D) Electrons and quarks. Show Answer Correct Answer: B) Protons and neutrons. 7. In discharged tube voltage and pressure were respectively- A) 10000 V, 0.01 mmHg. B) 1000 V, 0.01 mmHg. C) 10000 V, 0.001 mmHg. D) 1000 V, 0.001 mmHg. Show Answer Correct Answer: C) 10000 V, 0.001 mmHg. 8. ATOMS THAT HAVE SAME MASS NO AND DIFFERENT ATOMIC NO ARE CALLED: A) ISOTONES. B) ISOTOPES. C) ISOMERS. D) ISOBARS. Show Answer Correct Answer: D) ISOBARS. 9. An atom that has a positive or negative charge A) Isotope. B) Element. C) Electron. D) Ion. Show Answer Correct Answer: D) Ion. 10. What is atomic mass? A) Neutrons + quarks. B) Neutrons + electrons. C) Protons + neutrons. D) Protons + electrons. Show Answer Correct Answer: C) Protons + neutrons. 11. Which of the following is the smallest particle that has the properties of an element? A) An atom of sodium. B) A neutron of helium. C) An electron of carbon. D) A proton of hydrogen. Show Answer Correct Answer: A) An atom of sodium. 12. The photoelectric effect only occurs if the light shining on the metal is: A) Coherent. B) Above a threshold intensity. C) Above a threshold frequency. D) Above a threshold wavelength. Show Answer Correct Answer: C) Above a threshold frequency. 13. What prevents an atom from being collapsed? A) The nuclear forces. B) Movement of electrons in discrete energy levels. C) The electron-electron repulsions. D) All of these. Show Answer Correct Answer: B) Movement of electrons in discrete energy levels. 14. For an element, Z = 9. The valency of this element will be: A) 2. B) 4. C) 1. D) 3. Show Answer Correct Answer: C) 1. 15. What is the common name for the group of elements known as Group 17 in the periodic table? A) Alkali metals. B) Halogens. C) Transition metals. D) Noble gases. Show Answer Correct Answer: B) Halogens. 16. It is the quantum number that describes the "shape" of the orbital. A) Spin Quantum Number. B) Principal Quantum Number. C) Magnetic Quantum Number. D) Angular Momentum Quantum Number. Show Answer Correct Answer: D) Angular Momentum Quantum Number. 17. Place the following atomic models in order, from earliest to latest:A) Rutherford B) Thomson C) Dalton A) C, A, B. B) C, B, A. C) B, C, A. D) A, C, B. Show Answer Correct Answer: B) C, B, A. 18. What did Thomson discover? A) Proton. B) Electron. C) Neutron. D) Electron cloud. Show Answer Correct Answer: B) Electron. 19. What is the threshold frequency? A) Minimum intensity for emission. B) Minimum frequency for photoemission. C) Photoelectric current. D) Energy per photon. Show Answer Correct Answer: B) Minimum frequency for photoemission. 20. The wavelength of the electron emitted, when in a hydrogen atom, electron falls from infinity to stationary state 1, would be [Rydberg's constant = 1.097 x 10$^{7}$ m$^{-1}$ ] A) 91 nm. B) 406 nm. C) 9.1 x 10$^{-8}$ nm. D) 192 nm. Show Answer Correct Answer: A) 91 nm. 21. Which of the following is a substance that can not be broken down into a simpler substance? A) Element. B) Atomic Number. C) Isotope. D) Compound. Show Answer Correct Answer: A) Element. 22. How many maximum number of electrons can accomodate 3rd shell/ M shell? A) 32. B) 2. C) 8. D) 18. Show Answer Correct Answer: D) 18. 23. Which is NOT unit of charge A) Angstrom. B) Ampere*second. C) Esu. D) Coulomb. Show Answer Correct Answer: A) Angstrom. 24. Most penetrating radiation of a radioactive element is A) $\beta$. B) $\alpha$. C) $\gamma$. D) None of these. Show Answer Correct Answer: C) $\gamma$. 25. What is the electron configuration for nitrogen? A) 1s$^{2}$ 2$^{}$s$^{2}$ 2p$^{3}$. B) 1s$^{2}$ 2$^{}$s$^{3}$ 2p$^{2}$. C) 1s$^{2}$ 2$^{}$s$^{2}$ 2p$^{2 }$3s$^{1}$. D) 1s$^{2}$ 2$^{}$s$^{3}$ 2p$^{1}$. Show Answer Correct Answer: A) 1s$^{2}$ 2$^{}$s$^{2}$ 2p$^{3}$. 26. What types of particles are found in the cloud surrounding the atom's nucleus? A) Positively charged particles and negatively charged particles. B) Negatively charged particles only. C) Neutral particles and positively charged particles. D) Positively charged particles only. Show Answer Correct Answer: B) Negatively charged particles only. 27. An ion with mass number 37 possesses one unit of negative charge. if the ion contains 11.1 % more neutrons than the electrons, find the symbol of the ion. A) $_{17}$Cl$^{37 (-1)}$. B) $_{18}$Ar$^{37}$. C) $_{17}$Cl$^{37 }$. D) $_{18}$Ar$^{37 (-1)}$. Show Answer Correct Answer: A) $_{17}$Cl$^{37 (-1)}$. 28. An electron has a ..... charge. A) Negative. B) Positive. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Negative. 29. The wavelength of a electron and a neutron will become equal when the velocity if a electrons is x time. The velocity of neutronthe value of x is ..... (nearest integer) A) 1758. B) 8571. C) 1578. D) 1758. Show Answer Correct Answer: A) 1758. 30. The temperature at which a substance changes from a liquid to a gas. A) Boiling Point. B) Melting Point. C) Ballpoint Pen. D) 32$^{0}$ F. Show Answer Correct Answer: A) Boiling Point. 31. What is the maximum number of electrons that can be associated with the following set ofquantum numbers n = 2, l = 1, m =-1 A) 2. B) 1. C) 6. D) 8. Show Answer Correct Answer: A) 2. 32. What is the mass number (A) of an atom? A) Number of protons plus neutrons. B) Number of protons only. C) Number of neutrons only. D) Number of electrons plus protons. Show Answer Correct Answer: A) Number of protons plus neutrons. 33. Electrons have this type of charge? A) Negative. B) Positive. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Negative. 34. A table that shows the elements arranged by their atomic numbers A) Periodic Table. B) Wooden Table. C) Occasional Table. D) Dining Room Table. Show Answer Correct Answer: A) Periodic Table. 35. The cathode ray experiments led to which particle being discovered? A) Nucleus. B) Neutron. C) Electron. D) Proton. Show Answer Correct Answer: C) Electron. 36. Rutherford's alpha-particle scattering experiment was responsible for the discovery of A) PROTON. B) NEUTRON. C) ATOMIC NUCLEUS. D) ELECTRON. Show Answer Correct Answer: C) ATOMIC NUCLEUS. 37. What part of the element determines if it will react with another element? A) The number of neutrons. B) The number of valence electrons. C) The number of protons. D) The overall charge of the atoms. Show Answer Correct Answer: B) The number of valence electrons. 38. Which of the following is formed when lead acetate is reacted with potassium iodide? A) Green precipitate. B) White precipitate. C) Yellow precipitate. D) Brown precipitate. Show Answer Correct Answer: C) Yellow precipitate. 39. Fluorine, chlorine, bromine, iodine, and astatine make up Group 17. Why are these elements grouped together? A) They are all very reactive nonmetals with similar chemical properties. B) They are all nonreactive gases with similar physical properties. C) Their atoms all have eight electrons in their outer energy levels. D) They all have the same atomic number. Show Answer Correct Answer: A) They are all very reactive nonmetals with similar chemical properties. 40. NO OF PROTONS PRESENT IN CHLORIDE ION ARE: A) 17. B) 20. C) 18. D) 16. Show Answer Correct Answer: A) 17. 41. Radial nodes present in 3s orbital are A) 4. B) 3. C) 1. D) 2. Show Answer Correct Answer: D) 2. 42. What is the name of J.J. Thomson's Model of an Atom? A) Jimmy Neutron Model. B) Plum-Pudding Model. C) Quantum mechanical Model. D) Solar System Model. Show Answer Correct Answer: B) Plum-Pudding Model. 43. The magnetic quantum number specifies A) Shape of orbitals. B) Nuclear Stability. C) Size of orbitals. D) Orientation of orbitals. Show Answer Correct Answer: D) Orientation of orbitals. 44. The number of electrons in the M shell of P (Z =15) is: A) 4. B) 2. C) 3. D) 5. Show Answer Correct Answer: D) 5. 45. The energy of an electron in 3$^{rd}$ orbit of hydrogen atom is: A) -327.9 kJ/mol. B) -1311.8 kJ/mol. C) -82.0 kJ/mol. D) -145.7 kJ/mol. Show Answer Correct Answer: D) -145.7 kJ/mol. 46. Which radioisotope is used for the diagnosis of tumor in the body? A) Strontium-90. B) Iodine-131. C) Phosphorous-30. D) Cobalt-60. Show Answer Correct Answer: B) Iodine-131. 47. The particle not present in an ordinary hydrogen atom is: A) Nucleus. B) Electron. C) Proton. D) Neutron. Show Answer Correct Answer: D) Neutron. 48. An electron fro which n=4 has more ..... than an electron for which n=2. A) Spin. B) Energy. C) Particle nature. D) Wave natrue. Show Answer Correct Answer: B) Energy. 49. 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(ii) Bohr's atomic mode A) L(a) (i), (ii) and (iii). B) (b) (ii), (iii) and (i). C) (c) (ii), (i) and (iii). D) (d) (iii), (ii) and (i). Show Answer Correct Answer: C) (c) (ii), (i) and (iii). 50. Isotopes are elements with a different amount of A) Electrons. B) Protons. C) Neutrons. D) Atoms. Show Answer Correct Answer: C) Neutrons. 51. Whose mass is considered as negligible and its charge is minus one? A) Nucleus. B) Neutrons. C) Electrons. D) Protons. Show Answer Correct Answer: C) Electrons. 52. A student is given two diagrams, a neutral copper atom and a neutral mercury atom. Which statement best describes the difference in the number of electrons for these two atoms? A) Copper has 51 more electrons than mercury. B) Mercury has 29 less electrons than copper. C) Mercury has 51 more electrons than copper. D) Copper has 29 less electrons than mercury. Show Answer Correct Answer: C) Mercury has 51 more electrons than copper. 53. What is the spin quantum number for clockwise spin? A) +1. B) -1/2. C) 0. D) +1/2. Show Answer Correct Answer: D) +1/2. 54. What is a black body? A) Perfect absorber & emitter. B) Dark body. C) White light. D) Good conductor. Show Answer Correct Answer: A) Perfect absorber & emitter. 55. When electromagnetic radiations of wavelength 300 nm falls on surface of sodium, electrons are emitted with a kinetic energy of 1.68 X 10$^{5}$ J/mol. what is the minimum energy needed to remove an electron from sodium. what is the maximum wavelength that will cause a photoelectron to be emitted? A) 3.84 X10$^{-19}$J, 517 nm. B) 3.84 X10$^{-19}$J, 198.5X10$^{-15}$nm. C) 2.31 X10$^{5}$J, 198.5X10$^{-15}$ nm. D) 2.31 X10$^{5}$J, 517 nm. Show Answer Correct Answer: A) 3.84 X10$^{-19}$J, 517 nm. 56. Based on their locations in the periodic table, which element has chemical properties most similar to those of calcium, Ca? A) Potassium, K. B) Beryllium, Be. C) Yttrium, Y. D) Titanium, Ti. Show Answer Correct Answer: B) Beryllium, Be. 57. The isotopes of an element contain: A) Different number of neutrons but same number of protons. B) Different number of protons as well as different number of neutrons. C) Same number of neutrons but different number of electrons. D) Same number of neutrons but different number of protons. Show Answer Correct Answer: A) Different number of neutrons but same number of protons. 58. Rutherford's experiment on scattering of $\alpha$ particles showed for the first time that the atom has A) Nucleus. B) Electron. C) Proton. D) Neutron. Show Answer Correct Answer: A) Nucleus. 59. How many lines can be formed in the ultraviolet range for all the transitions involving the first seven energy levels in the emission spectrum for the hydrogen atom? A) 6. B) 10. C) 18. D) 7. Show Answer Correct Answer: A) 6. 60. Nucleus consist a combination of A) Proton and electron. B) Proton and neutron. C) Electron and neutron. D) None of the above. Show Answer Correct Answer: B) Proton and neutron. ← 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 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