This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 42 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 42 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If an atom has 17 protons, 18 neutrons, and 17 electrons, what is the mass of this atom? A) 17. B) 18. C) 35. D) 52. Show Answer Correct Answer: C) 35. 2. In an alpha scattering experiment, few alpha particles rebounded because A) Most of the space in the atom is occupied. B) Positive charge of the atoms very little space. C) The mass of the atom is concentrated in the centre. D) All the positive charge and mass of the atom is concentrated in small volume. Show Answer Correct Answer: B) Positive charge of the atoms very little space. 3. What is its valency? A) (a)Number of electrons lost during a bond formation. B) (b) Number of electrons gained during a bond formation. C) (c) Number of electrons shared during a bond formation. D) All three options:(a), (b) and (c ). Show Answer Correct Answer: D) All three options:(a), (b) and (c ). 4. Mass of an Electron is about 1/20000 times that of Proton. True or False A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 5. How many electrons are present in n=3, l=1, m=-1 0 +1 A) 2. B) 6. C) 10. D) 14. Show Answer Correct Answer: B) 6. 6. The radioactive isotope used in the treatment of cancer is: A) Plutonium-239. B) Arsenic-74. C) Cobalt-60. D) Iodine-131. Show Answer Correct Answer: C) Cobalt-60. 7. In the gold foil experiment, most of the positively charged alpha particles passed through the gold foil, but some were deflected or bounced back. What did this prove? A) Atoms are small indivisible spheres. B) Atoms are mostly empty space with a small, dense, positive center. C) Atoms have negatively charged particles which orbit the nucleus. D) Light is a wave, not a particle. Show Answer Correct Answer: B) Atoms are mostly empty space with a small, dense, positive center. 8. Which radioactive element is used in the treatment of cancer? A) (a) Iodine-131. B) (b) Uranium-234. C) (c) Plutonium-239. D) Cobalt-60. Show Answer Correct Answer: D) Cobalt-60. 9. LAW OF ELECTROLYSIS related to which scientist? A) Michael Faraday. B) William Crooke. C) Humphry Davy. D) James Chadwick. Show Answer Correct Answer: A) Michael Faraday. 10. Mass number is? A) Only P. B) Only N. C) P + N. D) P + N + E. Show Answer Correct Answer: C) P + N. 11. What is the electron configuration of an atom? A) The electron configuration of an atom is the total mass of the atom. B) The electron configuration of an atom is a representation of how the electrons are distributed in the atomic orbitals. C) The electron configuration of an atom is the number of protons in the nucleus. D) The electron configuration of an atom is the arrangement of neutrons in the nucleus. Show Answer Correct Answer: B) The electron configuration of an atom is a representation of how the electrons are distributed in the atomic orbitals. 12. How many electrons are present in M shell if the atomic number is 20 A) 5. B) 18. C) 12. D) 8. Show Answer Correct Answer: D) 8. 13. ISOTOPE OF FOLLOWING ELEMENT IS USED IN TREATMENT OF GOITRE A) COBALT. B) IODINE. C) URANIUM. D) MAGNESIUM. Show Answer Correct Answer: B) IODINE. 14. The Gold foil Experiment was conducted by A) Ernest Rutherford. B) James Chadwick. C) JJ Thomson. D) Eugen Goldstein. Show Answer Correct Answer: A) Ernest Rutherford. 15. A neutron has ..... charge or is ..... A) Negative neutral. B) Positive neutral. C) No negative. D) No neutral. Show Answer Correct Answer: D) No neutral. 16. Which subatomic particles are found in the nucleus of an atom? A) Protons and Electrons. B) Protons and Neutrons. C) Neutrons and Electrons. D) Protons, Neutrons and Electrons. Show Answer Correct Answer: B) Protons and Neutrons. 17. The symbol for PHOSPHORUS is ..... A) Ph. B) Po. C) P. D) Ps. Show Answer Correct Answer: C) P. 18. An isotope of iodine is used for making tincture iodine, which is used as a medicine. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 19. The meaning of Greek word "atomos" is A) Whole. B) Incomplete. C) Cosmos. D) Indivisible. Show Answer Correct Answer: D) Indivisible. 20. Which of the following transitions are allowed A) N = 1, l = 4, m = 3, s = +1. B) N = 4, l = 0, m =-2, s = +1/2. C) N = 2, l = 2, m = 0, s =-1/2. D) N = 5, l = 4, m = 4, s = +1/2. Show Answer Correct Answer: D) N = 5, l = 4, m = 4, s = +1/2. 21. The part of an atom where nearly whole mass is concentrated is called A) Extra-nuclear part. B) Nucleus. C) Atom. D) Neutron. Show Answer Correct Answer: B) Nucleus. 22. What is the formula for finding the number of electrons present in the shell? A) $2n^2$. B) 2n. C) $2n^3$. D) None of the above. Show Answer Correct Answer: A) $2n^2$. 23. Which of the following electron transitions in the hydrogen atom has the highest frequency? A) N$_{3 }$to n$_{1}$. B) N$_{4 }$to n$_{2}$. C) N$_{5 }$to n$_{3}$. D) N$_{7 }$to n$_{2}$. Show Answer Correct Answer: A) N$_{3 }$to n$_{1}$. 24. What is the symbol for CALCIUM? A) C. B) Cl. C) Ca. D) Cm. Show Answer Correct Answer: C) Ca. 25. What is the electrical charge of the nucleus? A) Positive. B) Negative. C) Neutral. D) All of the above. Show Answer Correct Answer: A) Positive. ← PreviousNext →Related 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 8Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 9Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books