This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 3 Classification Of Elements And Periodicity In Properties – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 3 Classification Of Elements And Periodicity In Properties Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The number of elements known at present is ..... A) 31. B) 75. C) 114. D) 63. Show Answer Correct Answer: C) 114. 2. Which block of modern predic table have all types of element i.e metal, nonmetal & metalloids A) D. B) F. C) P. D) S. Show Answer Correct Answer: C) P. 3. The electronic configuration of Gd$^{2+}$ is( At. no. of Gd is 64) A) [Xe] 4f$^{7}$ 5d$^{1}$ 6s$^{2}$. B) [Xe] 4f$^{7}$. C) [Xe] 4f$^{7}$ 5d$^{1}$. D) [Xe] 4f$^{8}$. Show Answer Correct Answer: C) [Xe] 4f$^{7}$ 5d$^{1}$. 4. Which elements discovery was credit by both American and Soviet scientist A) Element have atomic number 103. B) Element have atomic number 104 and IUPAC official name is ratherfordium. C) Dubnium. D) None. Show Answer Correct Answer: B) Element have atomic number 104 and IUPAC official name is ratherfordium. 5. The atomic number of rubidium Indium, Gallium, xenon and antimony will be A) 49, 37, 31, 54, 51. B) 37, 49, 31, 54, 51. C) 51, 54, 32, 49, 37. D) 51, 54, 49, 37, 19. Show Answer Correct Answer: B) 37, 49, 31, 54, 51. 6. Identify the symbol of element with atomic number 112 A) Uub. B) Nub. C) Ubb. D) Unb. Show Answer Correct Answer: A) Uub. 7. Element with atomic number 56 belongs to which block? A) P. B) F. C) S. D) D. Show Answer Correct Answer: C) S. 8. In the modern periodic table, the number of period of the element is the same as A) Atomic number. B) Atomic mass. C) Azimuthal quantum number. D) Principal quantum number. Show Answer Correct Answer: D) Principal quantum number. 9. Who proposed periodic law for the first time A) Henry Mosely. B) Mendeleev. C) Pauling. D) Newlands. Show Answer Correct Answer: B) Mendeleev. 10. The factors affecting ionization enthalpy are A) Decrease in nuclear charge & decrease in atomic size. B) Decrease in nuclear charge & increase in atomic size. C) Increase in nuclear charge & increase in atomic size. D) Increase in nuclear charge & decrease in atomic size. Show Answer Correct Answer: D) Increase in nuclear charge & decrease in atomic size. 11. What is the correct iupac name for element with atomic number 114: A) Ununfortium. B) Eka lead. C) Bohrium. D) Ununquadium. Show Answer Correct Answer: D) Ununquadium. 12. Isoelectronic species have ..... A) Same number of electron. B) Same number of proton. C) Number of neutron. D) None of these. Show Answer Correct Answer: A) Same number of electron. 13. 18 group elements have highest ionization enthalpy because A) They have d orbitals. B) They have stable electronic configuration. C) They are inert. D) None of these. Show Answer Correct Answer: B) They have stable electronic configuration. 14. The size of cation is ..... the size of parent atom A) Similar. B) Larger than. C) Same as. D) Smaller than. Show Answer Correct Answer: D) Smaller than. 15. An element with atomic number 106 has been discovered recently. Which of the following electronic configurations will it possess? A) [Rn] 5f$^{14}$ 6d$^{1}$ 7s$^{2}$ 7p$^{3}$. B) [Rn] 5f$^{14}$ 6d$^{4}$ 7s$^{2}$. C) [Rn] 5f$^{14}$ 6d$^{6}$ 7s$^{0}$. D) [Rn] 5f$^{14}$ 6d$^{5}$ 7s$^{1}$. Show Answer Correct Answer: B) [Rn] 5f$^{14}$ 6d$^{4}$ 7s$^{2}$. 16. Which group elements are called transition metals? A) Group number 1 to 8. B) Group number 1 to 2. C) Group number 3 to 12. D) Group number 13 to 18. Show Answer Correct Answer: C) Group number 3 to 12. 17. The general electronic configuration of d-block elements A) (n-1)d$^{1-10}$ns$^{1-2}$. B) Ns$^{1-2}$. C) (n-2)f$^{1-14}$(n-1)d$^{0-1}$ns$^{2}$. D) Ns$^{2}$np$^{1-6}$. Show Answer Correct Answer: A) (n-1)d$^{1-10}$ns$^{1-2}$. 18. The element with atomic number 117 if discovered would be placed in A) Noble gas family. B) Alkaline earth family. C) Halogen family. D) Alkali family. Show Answer Correct Answer: C) Halogen family. 19. General electronic configuration for 15 group element is A) Ns2np5. B) Ns2np3. C) Ns2np6. D) Ns2np6. Show Answer Correct Answer: B) Ns2np3. 20. Which of the following is most reactive A) H. B) Na. C) Li. D) K. Show Answer Correct Answer: D) K. 21. 16 group elements are called as calchogens because ..... A) They are found on earth crust. B) Most of the minerals are found in the form their oxides or sulphide. C) They have Oxygen and sulphur. D) Because they are minerals. Show Answer Correct Answer: B) Most of the minerals are found in the form their oxides or sulphide. 22. Li resembles in its properties with ..... of 3rd period A) Na. B) Al. C) K. D) Mg. Show Answer Correct Answer: D) Mg. 23. The outermost electronic configuration for iodine is A) [Xe]5s2 5p5. B) [Kr]6s2 6p5. C) [Kr] 4s2 4p5. D) [Kr]5s2 5p5. Show Answer Correct Answer: D) [Kr]5s2 5p5. 24. Element is called as Rouge element A) Lithium. B) Helium. C) Hydrogen. D) Oxygen. Show Answer Correct Answer: C) Hydrogen. 25. Question 33. In the modern periodic table, the period indicates the value of A) Azimuthal quantum number. B) Atomic numberr. C) Mass number. D) Principal quantum numbe. Show Answer Correct Answer: D) Principal quantum numbe. 26. Which of the following sets has strongest tendency to form anions? A) N, O, F. B) Ga, In, Tl. C) V, Cr, Mn. D) Na, Mg, Al. Show Answer Correct Answer: A) N, O, F. 27. Second group elements are called as A) Alkali metal. B) Alkaline earth metal. C) Halogen. D) None of these. Show Answer Correct Answer: B) Alkaline earth metal. 28. The number of elements in each of the inner transition series is ..... A) 14. B) 10. C) 2. D) 8. Show Answer Correct Answer: A) 14. 29. The ionisation enthalpy of Beryllium is greater than Boron because A) Half filled electronic configuration of Be. B) Half filled electronic configuration of B. C) Completely filled electronic configuration of Be. D) Completely filled electronic configuration of B. Show Answer Correct Answer: C) Completely filled electronic configuration of Be. 30. In the modern periodic table, which one of the following does not have appropriate positions? A) Inert gases. B) Transition elements. C) Inner transition elements. D) Halogens. Show Answer Correct Answer: C) Inner transition elements. 31. Which element has highest electron gain enthalpy A) Fluorine. B) Sodium. C) Chlorine. D) Magnesium. Show Answer Correct Answer: C) Chlorine. 32. The elements of group 17 are called A) Alkali metals. B) Halogens. C) Transition elements. D) Chalcogens. Show Answer Correct Answer: B) Halogens. 33. Consider the following species:N3-, O2-, F-, Na+, Mg2+and Al3+(b) Arrange them in the order of increasing ionic radii. A) N3-< O2-< Al3+ < Mg2+ < Na+ < F-. B) Al3+ C) Al3+ < Mg2+ < Na+ < F-< O2-< N3-. D) < F-< O2-< N3- Show Answer Correct Answer: C) Al3+ < Mg2+ < Na+ < F-< O2-< N3-. 34. Law of Triads was referred to as ..... relationship. A) Lothar Meyer's. B) Mendeleev's. C) Newlands's. D) Dobereiner's. Show Answer Correct Answer: D) Dobereiner's. 35. Eka-aluminium and Eka-silicon are known as A) Gallium and germanium. B) Aluminium and silicon. C) Iron and sulphur. D) Proton and silicon. Show Answer Correct Answer: A) Gallium and germanium. 36. The magic number indicates ..... A) 2 8 8 18 18 32. B) 2 6 8 18 32 32. C) 2 8 8 18 32 32. D) 32 18 18 8 8 2. Show Answer Correct Answer: A) 2 8 8 18 18 32. 37. Which one of the following statements is incorrect in relation to ionization enthalpy? A) End of valence electrons is marked by a big jump in ionization enthalpy. B) The greatest increase in ionization enthalpy is experienced on removal of electron from core noble gas configuration. C) Ionization enthalpy increases for each successive electron. D) Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value. Show Answer Correct Answer: D) Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value. 38. The ionic radius of fluoride ion is 136pm while the atomic radius is 64pm . Why A) Atomic size decreases. B) Effective nuclear. C) Effective nuclear charge per electron increases. D) Effective nuclear charge per electron decreases. Show Answer Correct Answer: D) Effective nuclear charge per electron decreases. 39. In 1800 how many elements were known? A) 30. B) 53. C) 35. D) 31. Show Answer Correct Answer: D) 31. 40. The size of isoelectronic species-F-, Ne and Na+ is affected by A) Nuclear charge (Z ). B) Valence principal quantum number (n). C) Electron-electron interaction in the outer orbitals. D) None of the factors because their size is the same. Show Answer Correct Answer: A) Nuclear charge (Z ). 41. Among the elements from atomic number 1 to 56, the number of elemenets which havean unpaired electron in the s-subshell is A) 9. B) 6. C) 7. D) 4. Show Answer Correct Answer: B) 6. 42. Who discuss the properties of elements by plotting a graph between frequency of X-Ray and atomic number of each element A) Doberenier. B) Henry Moseley. C) Bohr. D) Mendeleev. Show Answer Correct Answer: B) Henry Moseley. 43. Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuratiuon of gadolinium? A) [Xe] 4f$^{7}$ 5d$^{1}$ 6s$^{2}$. B) [Xe] 4f$^{8}$ 6d$^{2}$. C) [Xe] 4f$^{6}$ 5d$^{2}$ 6s$^{2}$. D) [Xe] 4f$^{9}$ 5s$^{1}$. Show Answer Correct Answer: A) [Xe] 4f$^{7}$ 5d$^{1}$ 6s$^{2}$. 44. Pick out the correct statement regarding Law of Octaves. A) John Alexander Newlands propounded the Law of Octaves in 1855. B) He arranged the elements in decreasing order of their atomic weights and noted that every tenth element had properties similar to the first element. C) Newlands's Law of Octaves seemed to be true only for elements up to calcium. D) Mg and K show resemblance in properties. Show Answer Correct Answer: C) Newlands's Law of Octaves seemed to be true only for elements up to calcium. 45. PCl5 is possible but not NCl5 because ..... A) Because nitrogen have vacant d orbitals. B) Because chlorine do not have vacant d orbital. C) Because Phosphorus have vacant d orbital. D) None of these. Show Answer Correct Answer: C) Because Phosphorus have vacant d orbital. 46. The most significant contribution towards the development of periodic table was made by A) Mendeleev. B) Dalton. C) Avogadro. D) Cavendish. Show Answer Correct Answer: A) Mendeleev. 47. The noble gases are unreactive because A) They have a half outer shell of neutrons. B) They react with sodium. C) They have a full outer shell of electrons. D) They have a half outer shell of neutrons. Show Answer Correct Answer: C) They have a full outer shell of electrons. 48. Helium is not a p block element because A) It's last electron enter into s orbital. B) It does not have p orbitals. C) It belongs to 18 group elements. D) None of these. Show Answer Correct Answer: A) It's last electron enter into s orbital. 49. The element with atomic number 113 has recently been discorvered. Its electronic configuration is similar to that of A) Bi. B) Ga. C) Si. D) At. Show Answer Correct Answer: B) Ga. 50. French geologist A.E.B.de Chancourtois arranged the then known elements in order of ..... and made a ..... table of elements to display the periodic recurrence of properties. A) Increasing atomic weights; rectangular. B) Increasing atomic weights; cylindrical. C) Decreasing atomic weights; rectangular. D) Decreasing atomic weights; cylindrical. Show Answer Correct Answer: B) Increasing atomic weights; cylindrical. 51. According to the periodic Law of elements, the variation in properties of elements is related to their A) Nuclear masses. B) Atomic masses. C) Atomic number. D) Nuclear neutron-proton number ratios. Show Answer Correct Answer: C) Atomic number. 52. The atom of smallest atomic radius among the following is A) Na. B) Li. C) Br. D) K. Show Answer Correct Answer: C) Br. 53. Mendeleev classified elements in A) Increasing order of atomic groups. B) Eight periods and eight groups. C) Six periods and eight groups. D) Eight periods and seven groups. Show Answer Correct Answer: C) Six periods and eight groups. 54. In the modem periodic table, the period indicates the value of A) Mass number. B) Atomic numberr. C) Principal quantum numbe. D) Azimuthal quantum number. Show Answer Correct Answer: C) Principal quantum numbe. 55. The old periodic law states that the properties of the elements are a periodic function of their A) Atomic weights. B) Molar mass. C) Chemical properties. D) Physical properties. Show Answer Correct Answer: A) Atomic weights. 56. Silicon and antimony belongs to group ..... A) 15 & 14. B) 14 &15. C) 3 & 5. D) 16 & 15. Show Answer Correct Answer: B) 14 &15. 57. According Modern periodic law the chemical and physical property of the elements are the periodic function of ..... A) Atomic mass. B) Gram Atomic mass. C) Atomic Number. D) None. Show Answer Correct Answer: C) Atomic Number. 58. Which oxide is amphoteric in nature? A) Al2O3. B) ZnO. C) Both Al2O3 and ZnO. D) None of these. Show Answer Correct Answer: C) Both Al2O3 and ZnO. 59. Gennelly non metal oxides are ..... A) Amphoteric in nature. B) Acidic in nature. C) Neutral in nature. D) Basic in nature. Show Answer Correct Answer: B) Acidic in nature. 60. ..... has highest electronegativity A) Chlorine. B) Magnesium. C) Sodium. D) Fluorine. Show Answer Correct Answer: D) Fluorine. Next →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Chemistry (Part I) Chapter 3 Classification Of Elements And Periodicity In Properties Quiz 2Class 11 Chemistry (Part I) Chapter 1 Some Basic Concepts Of Chemistry QuizClass 11 Chemistry (Part I) Chapter 2 Structure Of Atom QuizClass 11 Chemistry (Part I) Chapter 4 Chemical Bonding And Molecular Structure QuizClass 11 Chemistry (Part I) Chapter 6 Thermodynamics QuizClass 11 Chemistry (Part I) Chapter 7 Equilibrium Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books