This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Science > Periodic Classification Of Elements > Class 10 Science Chapter 5 Periodic Classification Of Elements – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 5 Periodic Classification Of Elements Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of these is NOT a limitation of Newlands' law? A) He arranged them in an order of increasing atomic mass. B) He assumed there were only 63 elements. C) He could classify elements elements only up to calcium. D) He assumed there were only 56 elements. Show Answer Correct Answer: A) He arranged them in an order of increasing atomic mass. 2. Modern periodic table is based on ..... A) Molecular weight. B) Atomic number. C) Atomic weight. D) Equivalent weight. Show Answer Correct Answer: B) Atomic number. 3. The Newlands' law of octaves for the classification of elements was found to be applicable only up to the ..... element A) Calcium. B) Phosphorus. C) Potassium. D) Cobalt. Show Answer Correct Answer: A) Calcium. 4. The number of valence electrons present in nitrogen atom ..... A) 6. B) 5. C) 7. D) 8. Show Answer Correct Answer: B) 5. 5. Element X forms a chloride with the formula XCl2, which is a solid with a high melting point.X would most likely be in the same group of the Periodic Table as ..... A) Al. B) Mg. C) And. D) Na. Show Answer Correct Answer: B) Mg. 6. At the time of Mendeleev, the number of elements known was A) 62. B) 65. C) 63. D) 64. Show Answer Correct Answer: C) 63. 7. What group number are the noble gases A) 17. B) 18. C) 15. D) 14. Show Answer Correct Answer: B) 18. 8. In order to fill the periodic table, Newlands place two elements together in a slot The 2 elements were A) Iron and nickel. B) Iron and Cobalt. C) Zinc and lead. D) Cobalt and nickel. Show Answer Correct Answer: D) Cobalt and nickel. 9. Which one of the following is a Dobereiner Triad? A) And, high, al. B) N, are, ca. C) Li, on, k. D) F, Cl, Br. Show Answer Correct Answer: C) Li, on, k. 10. Which among the following elements has the largest atomic radii? A) Mg. B) K. C) Na. D) Ca. Show Answer Correct Answer: B) K. 11. Which of the blocks on the periodic table contains the most elements? A) P block. B) F block. C) S block. D) D block. Show Answer Correct Answer: D) D block. 12. Which was the first classification of elements? A) Newlands law of octaves. B) Dobernier Triads. C) Metal and non metal. D) Mendeleev periodic table. Show Answer Correct Answer: C) Metal and non metal. 13. Which group of the periodic table is composed of inert (not reactive) gases? A) Alkaline earth metals. B) Alkali metals. C) Noble gases. D) Halogens. Show Answer Correct Answer: C) Noble gases. 14. Electronegative character ..... down the group A) Increases. B) Decreases. C) No change. D) None of the above. Show Answer Correct Answer: B) Decreases. 15. Which among the following has the highest effective nuclear charge? A) C. B) O. C) F. D) N. Show Answer Correct Answer: C) F. 16. The basis of modern periodic law is ..... A) Atomic number. B) Isotopic mass. C) Number of neutrons. D) Atomic mass. Show Answer Correct Answer: A) Atomic number. 17. In the periodic table, the metallic character of elements ..... A) Decreases from left to right and down the group. B) Decreases from left to right and increases down the group. C) Increases from left to right and down the group. D) Increases from left to right and decreases down the group. Show Answer Correct Answer: B) Decreases from left to right and increases down the group. 18. What type of oxide would Eka-aluminium form? A) EO. B) Venetic. C) EO3. D) Hide. Show Answer Correct Answer: D) Hide. 19. What is the small group of elements called that include C, N, O A) Nonmetals. B) Noble gases. C) Metaloids. D) Metals. Show Answer Correct Answer: A) Nonmetals. 20. The three imaginary elements X, Y and Z represent a dobereiner triad. If the atomic mass of element X is 14 and that of element Y is 46 then atomic mass of elements Z will be A) 30. B) 28. C) 78. D) 60. Show Answer Correct Answer: C) 78. 21. Each column in the periodic table is called ..... A) Group. B) Cluster. C) Period. D) Unit. Show Answer Correct Answer: A) Group. 22. Which of the following set of elements are arranged in increasing order of non metallic character? A) Br, F, Cl. B) Cl, F, Br. C) F, Cl, Br. D) Br, Cl, F. Show Answer Correct Answer: D) Br, Cl, F. 23. Among noble gases, which noble gas forms maximum number of compunds A) He. B) It is. C) Ar. D) Car. Show Answer Correct Answer: D) Car. 24. The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all A) Nobel metals. B) Halogens. C) Light metals. D) Nobel gases. Show Answer Correct Answer: D) Nobel gases. 25. Nonmetals are on the: A) Left side. B) Right Side. C) Stairstep. D) None of the above. Show Answer Correct Answer: B) Right Side. 26. A horizontal row of elements in the periodic table. A) Period. B) Column. C) Group. D) Block. Show Answer Correct Answer: A) Period. 27. Among the following, the atom with the smallest size is: A) F. B) O. C) C. D) N. Show Answer Correct Answer: A) F. 28. To complete the octate, outer most shell of Magnesium ..... A) Looses two electrons. B) Shares four electrons. C) Looses three electrons. D) Gains three electrons. Show Answer Correct Answer: A) Looses two electrons. 29. The three elements having chemical symbols of Si, B and Ge are- A) All metals. B) All non metals. C) All metalloids. D) Si is metalloidB is metal Ge is non metal. Show Answer Correct Answer: C) All metalloids. 30. The long form of periodic table consists of ..... A) Seven periods & eighteen groups. B) Seven periods & either groups. C) Eight periods & eighteen groups. D) Eighteen periods & eight groups. Show Answer Correct Answer: A) Seven periods & eighteen groups. 31. ..... is a relative periodic property A) Atomic radii. B) Electronegativity. C) Ionic radii. D) Electron affinity. Show Answer Correct Answer: B) Electronegativity. 32. An element belongs to period 2 and group 2 the number of valence electrons in the atoms of this element is A) 3. B) 4. C) 1. D) 2. Show Answer Correct Answer: D) 2. 33. The atomic radius (covalent radius) of hydrogen atom is A) 37 micrometer. B) 37 picometer. C) 37 fifth. D) 37 nanometer. Show Answer Correct Answer: B) 37 picometer. 34. Where are the metaloids found A) Stair step/diagonal. B) At the bottom. C) Far right horizontal. D) Far left, vertical. Show Answer Correct Answer: A) Stair step/diagonal. 35. According to Modern periodic law, the properties of elements are the periodic functions of 'X' ; Identify 'X'. A) Atomic no of elements. B) Atomic densities of elements. C) Atomic mass of elements. D) Atomic volumes of elements. Show Answer Correct Answer: A) Atomic no of elements. 36. In which order do we need to put sodium, potassium, lithium, for Dobereiner's Law of Triads? A) Lithium, sodium, potassium. B) Sodium, potassium, lithium. C) Sodium, lithium, potassium. D) Potassium, lithium, sodium. Show Answer Correct Answer: A) Lithium, sodium, potassium. 37. Which one of the following does not increase while moving down the group of the periodic table? A) Atomic radius. B) Metallic character. C) Valence electron. D) Shells in the atom. Show Answer Correct Answer: C) Valence electron. 38. Pick out the chemically most reactive elements from the given triads.Li, Na, K F, Cl, Br A) Li and F. B) Li and Br. C) K and F. D) K and Br. Show Answer Correct Answer: C) K and F. 39. Which of the following properties does not match to the elements of halogen family? A) They have seven electrons in their valence shell. B) They are diatomic in their molecular form. C) They are chemically highly reactive. D) They are metallic in nature. Show Answer Correct Answer: D) They are metallic in nature. 40. The atom of an element has electronic con-figuration 2, 8, 7. To which of the following elements would it be chemically similar? A) N(7). B) P(15). C) Na(11). D) F (9). Show Answer Correct Answer: D) F (9). 41. Which one of the following elements would lose an electron easily? A) Ca. B) Mg. C) K. D) Na. Show Answer Correct Answer: C) K. 42. The arrangement of elements in the Modem Periodic Table is based on their A) Increasing atomic number in the horizontal rows. B) Increasing atomic mass in the group. C) Increasing atomic number in the vertical columns. D) Increasing atomic mass in the period. Show Answer Correct Answer: A) Increasing atomic number in the horizontal rows. 43. "when elements are arranged in the order of increasing atomic masses the elements with similar properties occur at regular intervals" . Who stated this? A) Dmitri Mendeleev. B) Russian scientist. C) Mendeleev. D) God. Show Answer Correct Answer: A) Dmitri Mendeleev. 44. In Mendeleev's Periodic Table how many periods and groups are present? A) 7 groups, 8 periods. B) 6 groups, 8 periods. C) 7 periods, 8 groups. D) 6 periods, 8 groups. Show Answer Correct Answer: D) 6 periods, 8 groups. 45. Which among the following has the least ionization energy? A) Lithium. B) Cesium. C) Magnesium. D) Sodium. Show Answer Correct Answer: B) Cesium. 46. Where would you locate the element with electronic configuration 2, 8 in the modern periodic table? A) Group 10. B) Group 18. C) Group 2. D) Group 8. Show Answer Correct Answer: B) Group 18. 47. The element that has the latin name "Argentum" is A) Tin. B) Oxygen. C) Silver. D) Potassium. Show Answer Correct Answer: C) Silver. 48. On moving from left to right in a short period, the valency of elements with respect tohydrogen ..... A) Remains unchanged. B) Decreases. C) Increases. D) First increases from 1 to 4 then decreases from 4 to 1. Show Answer Correct Answer: D) First increases from 1 to 4 then decreases from 4 to 1. 49. ..... elements were known when mendeleev presented the periodic table A) 92. B) 63. C) 64. D) 65. Show Answer Correct Answer: B) 63. 50. According to Mendeleev's Periodic law, the elements were arranged in the periodic table in the order of ..... A) Decreasing atomic number. B) Decreasing atomic masses. C) Increasing atomic number. D) Increasing atomic masses. Show Answer Correct Answer: D) Increasing atomic masses. 51. Which one of the following elements exhibit maximum number of valence electrons? A) Na. B) Al. C) And. D) P. Show Answer Correct Answer: D) P. 52. The valency of noble gases, in general is ..... A) 0. B) 2. C) 8. D) 1. Show Answer Correct Answer: A) 0. 53. Atoms of elements in group 1 have ..... A) Eight electrons in their outermost energy level. B) Seven electrons in their outermost energy level. C) One electron in their outermost energy level. D) Two electrons in their outermost energy level. Show Answer Correct Answer: C) One electron in their outermost energy level. 54. What is the big group of metals called found within the metals A) Halogens. B) Nonmetals. C) Noble gases. D) Transition metals. Show Answer Correct Answer: D) Transition metals. 55. How many groups are there in modern periodic table? A) 8. B) 18. C) 9. D) 17. Show Answer Correct Answer: B) 18. 56. Name the neutral atom in the Periodic Table which has the same number of electrons as K+ and Cl-. A) Argon. B) Helium. C) Krypton. D) Neon. Show Answer Correct Answer: A) Argon. 57. Neon shows zero electron affinity due to ..... A) Stable arrangement of neutrons. B) Stable configuration of electrons. C) Reduced size. D) Increased density. Show Answer Correct Answer: B) Stable configuration of electrons. 58. What are Group 1 elements known as? A) Alkaline earth metals. B) Transition elements. C) Alkali metals. D) Inner transition elements. Show Answer Correct Answer: C) Alkali metals. 59. On moving from top to bottom in a group, in the periodic table, size of an atom ..... A) Remains same. B) First increases, then decreases. C) Decreases. D) Increases. Show Answer Correct Answer: D) Increases. 60. An element which is an essential constituent of all organic compounds belong to ..... A) Group 16. B) Group 1. C) Group 15. D) Group 14. Show Answer Correct Answer: D) Group 14. ← PreviousNext →Related QuizzesScience QuizzesClass 10 QuizzesClass 10 Science Chapter 5 Periodic Classification Of Elements Quiz 1Class 10 Science Chapter 5 Periodic Classification Of Elements Quiz 3 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books