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 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 15 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Electron configuration of carbon is A) 2, 5. B) 2, 4. C) 2, 2. D) 2, 6. Show Answer Correct Answer: B) 2, 4. 2. For the hydrogen atom, the electron transition with the longest wavelenght is A) N$_{4 }$to n$_{2}$. B) N$_{7 }$to n$_{5}$. C) N$_{3 }$to n$_{1}$. D) N$_{5 }$to n$_{1}$. Show Answer Correct Answer: B) N$_{7 }$to n$_{5}$. 3. Nucleus of heavy elements do not have- A) Electrons. B) Neutrons. C) Protons. D) Nucleons. Show Answer Correct Answer: A) Electrons. 4. The spectral line in hydrogen spectrum obtained when the electron jumps from n=5 to n=2 energy level belongs to: A) Lyman series. B) Balmer series. C) Paschen series. D) Pfund series. Show Answer Correct Answer: B) Balmer series. 5. What can be found from the total of the subatomic particles in the nucleus? A) Number of electrons. B) Atomic mass. C) Charge of the nucleus. D) Atomic number. Show Answer Correct Answer: B) Atomic mass. 6. Magnetic Quantum Numbers is given by A) -l to +l. B) (2l + 1). C) Both of these. D) None of these. Show Answer Correct Answer: C) Both of these. 7. Which subatomic particle was discovered by Thomson? A) Neutrons. B) Protons. C) Quarks. D) Electrons. Show Answer Correct Answer: D) Electrons. 8. Who was the first one to propose a model for the structure of an atom? A) J.J.Thomson. B) Dalton. C) Rutherford. D) None of the above. Show Answer Correct Answer: A) J.J.Thomson. 9. An element has 16 protons. The number of electrons present in the valence shell of this element are ..... A) 4. B) 8. C) 6. D) 2. Show Answer Correct Answer: C) 6. 10. Which of the following statements about the electron is incorrect? A) It is a negatively charged particles. B) The mass of an electron is equal to the mass of a neutron. C) It is a basic constituent of all-atom. D) It is a constituent of cathode rays. Show Answer Correct Answer: B) The mass of an electron is equal to the mass of a neutron. 11. What was JJ Thompson's model of an atom called? A) The plum pudding model. B) The plum cake model. C) The dry fruit pudding model. D) None of the above. Show Answer Correct Answer: A) The plum pudding model. 12. Atomic number is denoted by? A) N. B) Z. C) K. D) A. Show Answer Correct Answer: B) Z. 13. Which of the following statements about Rutherford's model of atom are correct?(i) considered the nucleus as positively charged(ii) established that the $\alpha$-particles are four times as heavy as a hydrogen atom(iii) can be compared to solar system(iv) was in agreement with Thomson's model A) (i) and (iii). B) (ii) and (iii). C) (i) and (iv). D) Only (i). Show Answer Correct Answer: A) (i) and (iii). 14. Protons and neutrons are found in the ..... A) Bohr Model. B) Nucleus. C) Space. D) Energy levels. Show Answer Correct Answer: B) Nucleus. 15. Which of the following has the largest de-Broglie wavelength, provided all have equal velocity? A) CO2 molecule. B) Proton. C) Electron. D) NH4 molecule. Show Answer Correct Answer: C) Electron. 16. The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is A) 5, 1, 0. +1/2. B) 5, 0, -1, +1/2. C) 6, 0, 0. +1/2. D) 5, 0, 0. +1/2. Show Answer Correct Answer: D) 5, 0, 0. +1/2. 17. Science Day in Switzerland is dedicated to an Indian. Who is this great personality? A) Vikram Sarabhai. B) Homi Bhabha. C) A. P. J. Abdul Kalam. D) C. V. Raman. Show Answer Correct Answer: C) A. P. J. Abdul Kalam. 18. If the nitrogen atom had electronic configuration 1s$^{7}$, it would have energy lower than that of the normal ground state configuration 1s$^{2}$ 2s$^{2}$ 2p$^{3}$ because the electrons would be closer to the nucleus. Yet, 1s$^{7}$ is not observed because it violates. A) Bohr postulates of stationary orbits. B) Heisenberg uncertainty principle. C) Pauli's exclusion principle. D) Hund's rule. Show Answer Correct Answer: C) Pauli's exclusion principle. 19. Which of the following are found in the orbitals? A) Proton. B) Electron. C) Neutron. D) All of the above. Show Answer Correct Answer: B) Electron. 20. The mass of an electron is A) 9.1 x 10$^{-31}$ kg. B) 9.1 x 10$^{-28}$ g. C) Both. D) None. Show Answer Correct Answer: C) Both. 21. The chemical symbol for Argon is A) Ar. B) Au. C) A. D) Ag. Show Answer Correct Answer: A) Ar. 22. Which of the following orbitals in a multielectron atom has highest enegy A) 3p. B) 4s. C) 3d. D) 3s. Show Answer Correct Answer: B) 4s. 23. Found in the nucleus of an atom, this subatomic particle has a neutral (or no ) charge A) Whattheheckatron. B) Electron. C) Proton. D) Neutron. Show Answer Correct Answer: D) Neutron. 24. What is the (n + l) value for 4s orbital? A) 4. B) 7. C) 5. D) 6. Show Answer Correct Answer: A) 4. 25. To find the number of neutrons, we ..... A) Add protons and neutrons. B) Subtract protons and electrons. C) Subtract the mass number and atomic number. D) Subtract atomic number and electrons. Show Answer Correct Answer: C) Subtract the mass number and atomic number. 26. Which of the following would not be reactive? A) Sodium with 1 valence electrons. B) Oxygen with 8 total electrons. C) Neon with 8 valence electrons. D) Boron with 5 total electrons. Show Answer Correct Answer: C) Neon with 8 valence electrons. 27. What is the frequency of green light that has a wavelength of 500 nm? A) $6\times10^{-16}$. B) $6\times10^5$. C) $6\times10^{14}$. D) $6\times10^{-3}$. Show Answer Correct Answer: C) $6\times10^{14}$. 28. The atomic number will always be the same as A) Mass number and number of protons. B) Number of neutrons and protons. C) Number of electrons and protons. D) Number of electrons and neutrons. Show Answer Correct Answer: C) Number of electrons and protons. 29. Carbon 14 has how many protons? A) 8. B) 7. C) 6. D) 9. Show Answer Correct Answer: C) 6. 30. The area of space surrounding the nucleus. A) Isotope. B) Neutron. C) Electron cloud. D) Proton. Show Answer Correct Answer: C) Electron cloud. 31. The (n+l) value of 3p orbital? A) 6. B) 3. C) 5. D) 4. Show Answer Correct Answer: D) 4. 32. An orbital that can never exist according to the quantum description of the atom is A) 3d. B) 8s. C) 6d. D) 3f. Show Answer Correct Answer: D) 3f. 33. Which of the following statements is true about the Lyman and Balmer series? A) The intensity decreases as the frequency increases. B) The converging frequency for both series is the same. C) The line spectra for both series are formed in the visible light range. D) The spacing between the lines increases as the frequency increases. Show Answer Correct Answer: A) The intensity decreases as the frequency increases. 34. Each column in the periodic table, they contain similar properties. A) Atom. B) Element. C) Group. D) Period. Show Answer Correct Answer: C) Group. 35. S, p and d orbitals are present in which shell? A) N. B) K. C) L. D) M. Show Answer Correct Answer: D) M. 36. What does the number Z represent? A) Mass number. B) Atomic number. C) All the above. D) None of the above. Show Answer Correct Answer: B) Atomic number. 37. Subatomic particle that determines the identity of the atom. A) Neutron. B) Electron. C) Nucleus. D) Proton. Show Answer Correct Answer: D) Proton. 38. According to Bohr model, as long as an electrons revolve in a particular Orbit its energy ..... A) Decrease. B) Increase. C) Remains constant. D) Both decrease and increase. Show Answer Correct Answer: C) Remains constant. 39. The orbitals having the same energy are called A) Isobar. B) Iso orbital. C) Isotope. D) Degenerate. Show Answer Correct Answer: D) Degenerate. 40. Which subatomic particle is attracted to the nucleus? A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: C) Electron. 41. The Kinetic energy of the electron in an orbit of radius r in hydrogen atom from n= 10 state is A) E2 /r2. B) E2/r. C) E2/2r2. D) E2/2r. Show Answer Correct Answer: D) E2/2r. 42. Abnormal electronic configuration is for following elements A) Cu & Pd. B) Cu & Cr. C) Zn & Pt. D) Hg & Ag. Show Answer Correct Answer: B) Cu & Cr. 43. 15-Identify the wrong sequence of the elements in a group A) N, P, As. B) Cl, Br, I. C) Ca, Br, Ba. D) Cu, Au, Ag. Show Answer Correct Answer: C) Ca, Br, Ba. 44. True or False? Neutrons have a negative charge A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 45. A 50 watt bulb emits monochromatic light of wavelength 400 nm. calculate the number of photons emitted per second by the bulb. A) 5X10$^{-19}$sec$^{-1}$. B) 1X10$^{20}$ sec$^{-1}$. C) 1X10$^{-20}$ sec$^{-1}$. D) 2X10$^{20}$ sec$^{-1}$. Show Answer Correct Answer: B) 1X10$^{20}$ sec$^{-1}$. 46. Which particles are negatively charged and occupy the space outside the nucleus of an atom? A) Atom. B) Mass. C) Proton. D) Electron. Show Answer Correct Answer: D) Electron. 47. The orbital electron has the lowest energy level is A) K shell. B) M shell. C) L shell. D) N shell. Show Answer Correct Answer: A) K shell. 48. Which of the three particles has the smallest mass? A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: C) Electron. 49. Radial nodes present in 3s and 2p-orbitals are respectively A) 1, 2. B) 0, 2. C) 2, 1. D) 2, 0. Show Answer Correct Answer: D) 2, 0. 50. The ..... of an element equals the number of protons in an atom of that element A) Mass number. B) Isotopes. C) Atomic number. D) Atomic weight. Show Answer Correct Answer: C) Atomic number. 51. Which of the following quantum numbers tells the three-dimensional shape of an atomic orbital? A) Principal quantum number. B) Azimuthal quantum number. C) Spin quantum number. D) Magnetic quantum number. Show Answer Correct Answer: B) Azimuthal quantum number. 52. How many valence electrons does Hydrogen have? A) 2. B) 4. C) 1. D) 8. Show Answer Correct Answer: C) 1. 53. Calculate the number of radial nodes present in the 3d sub-shell. A) 0. B) 1. C) 2. D) 4. Show Answer Correct Answer: A) 0. 54. The spin of an electron is represented by this variable: A) L. B) S, m$_{s}$. C) N. D) M. Show Answer Correct Answer: B) S, m$_{s}$. 55. Select the pair of atoms which have same no. Of electrons in their outermost shell A) Mg, Fe. B) Na, Ca. C) N, O. D) Li, K. Show Answer Correct Answer: D) Li, K. 56. Which element has the most protons? A) N. B) C. C) Ca. D) H. Show Answer Correct Answer: C) Ca. 57. Electrons mass is not considered because it is 1/2000 times that of proton? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 58. The atomic number of an element is 17 and its mass number is 35, A) Has 18 electrons. B) Has 18 neutrons. C) It has 18 protons. D) Has 17 neutrons. Show Answer Correct Answer: B) Has 18 neutrons. 59. Which of the following pairs are isobars? A) $_{17}$Cl$^{35}$ & $_{17}$Cl$^{37}$. B) $_{18}$Ar$^{40}$ & $_{20}$Ca$^{40}$. C) $_{6}$C$^{12}$ & $_{6}$C$^{14}$. D) None of these. Show Answer Correct Answer: B) $_{18}$Ar$^{40}$ & $_{20}$Ca$^{40}$. 60. Which particle has a negative charge? A) Protron. B) Neutron. C) Neceus. D) Electron. Show Answer Correct Answer: D) Electron. ← 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