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 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 3 Classification Of Elements And Periodicity In Properties Quiz 2 (56 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. From left to right across a period the ionization enthalpy ..... A) Either increase/decrease. B) Decreases. C) No change. D) Increases. Show Answer Correct Answer: D) Increases. 2. Newlands could classify elements only upto A) Calcium. B) Chromium. C) Copper. D) Chlorine. Show Answer Correct Answer: A) Calcium. 3. Which of the reactions will need the maximum amount of energy? A) K+ $\rightarrow$ K+ ++ e-. B) Na $\rightarrow$ Na+ + e-. C) Ca+ $\rightarrow$ Ca++ + e-. D) C2+ $\rightarrow$ C3+ + e-. Show Answer Correct Answer: A) K+ $\rightarrow$ K+ ++ e-. 4. The common option state of 18 group element will be ..... A) Zero and eight. B) One And seven. C) 2 and 6. D) 3 and 5. Show Answer Correct Answer: A) Zero and eight. 5. Which group of elements indicate the doberenier triads? A) Ca, Sr, Na. B) Li, Na, Ba. C) Cl, Br, F. D) Li, Na, K. Show Answer Correct Answer: D) Li, Na, K. 6. F-block elements are collectively called as A) Transition element. B) Mainn group element. C) Inner transition element. D) None of the above. Show Answer Correct Answer: C) Inner transition element. 7. When Mg reacts with N it forms A) Mg3N2. B) Mg2N3. C) MgN3. D) Mg3N. Show Answer Correct Answer: A) Mg3N2. 8. The fluorine have less negative value of electron gain enthalpy than chlorine because A) Fluorine have large size than chlorine. B) Chlorine have vacant d orbitals. C) Fluorine have inter electronic repulsion due to small size. D) Chlorine have greater inter electronic repulsion than fluorine. Show Answer Correct Answer: C) Fluorine have inter electronic repulsion due to small size. 9. Mendeleev's predictions for the elements Eka-aluminium and Eka-silicon were discovered later as ..... and ..... respectively. A) Praseodymium; gadolinium. B) Gadolinium; germanium. C) Gallium; germanium. D) Praseodymium; gallium. Show Answer Correct Answer: C) Gallium; germanium. 10. WHICH OF THE FOLLOWING HAS MOST NEGATIVE ELECTRON GAIN ENTHALPY A) Cl. B) F. C) S. D) P. Show Answer Correct Answer: A) Cl. 11. The most widely used scale for measuring electronegativity A) Mulliken-Jaffe scale. B) Allred-Rochow scale. C) Linus Pauling scale. D) None of these. Show Answer Correct Answer: C) Linus Pauling scale. 12. According to modern periodic law the physical & chemical properties of elements are periodic function of their ..... A) Atomic volume. B) Atomic weight. C) Atomic number. D) Atomic size. Show Answer Correct Answer: C) Atomic number. 13. Element with valence shell electronic configuration as (n-1)d$^{5}$ ns$^{1}$ is placed in which of the following group and block of elements? A) 1, s-block. B) 6, d-block. C) 16, s-block. D) 7, s-block. Show Answer Correct Answer: B) 6, d-block. 14. Which of the following oxide is the most basic oxide? A) FeO. B) CaO. C) NaO. D) CuO. Show Answer Correct Answer: C) NaO. 15. Who arranged the elements by increasing atomic number? A) John Newlands. B) Lothar Meyer. C) Dmitri Mendeleev. D) Henry Moseley. Show Answer Correct Answer: D) Henry Moseley. 16. Of the following pairs, the one containing examples of metalloid elements in the periodic table is A) Na and K. B) F and Cl. C) Cu and Hg. D) Si and Ge. Show Answer Correct Answer: D) Si and Ge. 17. The correct order of the 1st ionization enthalpy among following elements Be, B, C, N, O, is A) B < Be < C < O < N. B) B < C < O < Be < N. C) B < Be < C < N < O. D) B < C < Be < N < O. Show Answer Correct Answer: A) B < Be < C < O < N. 18. 17th Group elements have most negative value of electron gain enthalpy because A) Fluorine is most electronegative. B) They are called as halogens. C) They have ns2 np5 electronic configuration due to which they need only one electron to acquire noble gas configuration. D) They have 7 electron in their outermost shell. Show Answer Correct Answer: C) They have ns2 np5 electronic configuration due to which they need only one electron to acquire noble gas configuration. 19. IUPAC indicates ..... A) International union of pure and applied. B) International union of pure and applied chemistry. C) International union of pure and applied chemical industry. D) National union of pure chemistry. Show Answer Correct Answer: B) International union of pure and applied chemistry. 20. In the modern periodic table, the period indicates the value of: A) Principal quantum number. B) Azimuthal quantum number. C) Atomic number. D) Atomic mass. Show Answer Correct Answer: A) Principal quantum number. 21. Which element has highest ionisation enthalpy A) Li. B) Na. C) K. D) Rb. Show Answer Correct Answer: A) Li. 22. The atoms of elements belonging to the same group of periodic table have the same A) Number of electrons in the outermost shell. B) Number of neutrons. C) Number of protons. D) Number of electrons. Show Answer Correct Answer: A) Number of electrons in the outermost shell. 23. The anomalous behavior of first element in each group is due to A) Absence of d-orbital. B) Small size. C) High ionization enthalpy. D) All of these. Show Answer Correct Answer: D) All of these. 24. Which of the following atoms has the highest electronegativity? A) Mg. B) O. C) K. D) C. Show Answer Correct Answer: B) O. 25. Cl has high electron gain enthalpy than F A) Small size of 2p orbital of F. B) Small size of 3p orbital of Cl. C) Small size of 2p orbital of Cl. D) None of these. Show Answer Correct Answer: A) Small size of 2p orbital of F. 26. In the following the element with the highest ionization energy is A) [Ne] 3s$^{2 }$3p$^{3}$. B) [Ne] 3s$^{2 }$3p$^{4}$. C) [Ne] 3s$^{2}$ 3p$^{1}$. D) [Ne] 3s$^{2 }$3p$^{2}$. Show Answer Correct Answer: A) [Ne] 3s$^{2 }$3p$^{3}$. 27. According to mendeleev the horizontal rows are called as ..... and vertical columns are called as ..... A) Period and Group. B) Series and Group. C) Group and Period. D) Group and Series. Show Answer Correct Answer: B) Series and Group. 28. The compound formed by the combination of silicon and chlorine will be A) SiCl2. B) SiCl5. C) SiCl4. D) SiCl3. Show Answer Correct Answer: C) SiCl4. 29. The atomic size down the group ..... and Ionization enthalpy along the period ..... A) Decreases & decreases. B) Increases & decreases. C) Decreases & increases. D) Increases & increases. Show Answer Correct Answer: D) Increases & increases. 30. IUPCC name of element with atomic number 115 will be A) UN uncardium. B) Ununpentium. C) Unnilpentium. D) Ununqudium. Show Answer Correct Answer: B) Ununpentium. 31. The name of the element with atomic number 120 A) Unbinilium. B) Unnilbium. C) Ununnilium. D) Ununbium. Show Answer Correct Answer: A) Unbinilium. 32. The atomic mass of Sr as predicted according to the Dobereiner's law of triads in the triad Ca(Z=40), Sr, Ba(Z=137)is ..... A) 100. B) 88. C) 85. D) 80. Show Answer Correct Answer: B) 88. 33. An element 'M' has atomic number 9 and mass number 19 respectively.Its ion will be represented by: A) M$^{-2}$. B) M$^{-1}$. C) M. D) M$^{2+}$. Show Answer Correct Answer: B) M$^{-1}$. 34. Which pair of atomic numbers represents s-block elements? A) 9, 17. B) 4, 12. C) 7, 15. D) 6, 12. Show Answer Correct Answer: B) 4, 12. 35. The highly metallic element will have the configuration of A) 2, 8, 8, 5. B) 2, 8, 8, 1. C) 2, 8, 2. D) 2, 8, 7. Show Answer Correct Answer: B) 2, 8, 8, 1. 36. Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell? A) Nuclear charge (Z ). B) Number of core electrons. C) Valence principal quantum number (n). D) Nuclear mass. Show Answer Correct Answer: D) Nuclear mass. 37. The most electronegative element is A) Flourine. B) Chlorine. C) Nitrogen. D) Caesium. Show Answer Correct Answer: A) Flourine. 38. The atomic number of cerium (Ce) is 58. The correct electronic configuration of Ce$^{3+}$ ion is A) [Kr] 4f$^{1}$. B) [Xe] 4f$^{1}$. C) [Kr] 4d$^{1}$. D) [Xe] 4f$^{13}$. Show Answer Correct Answer: B) [Xe] 4f$^{1}$. 39. Which Medal is given by the royal society of London to newlands in 1887? A) Nobel Medel. B) Davy Medal. C) Calicum Medal. D) None of these. Show Answer Correct Answer: B) Davy Medal. 40. Modern periodic law is based on ..... A) No. of protons. B) No. of electrons. C) No. of neutrons. D) None of these. Show Answer Correct Answer: A) No. of protons. 41. Which of the following sets represent a collection of isoelectronic species?( At. nos. Cs=55, Br=35 ) A) Be, Al$^{3+}$, Cl$^{-}$. B) N$^{3-}$, F$^{-}$, Na$^{+}$. C) Ca$^{2+}$, Cs$^{+}$, Br. D) Na$^{+}$, Ca$^{2+}$, Mg$^{2+}$. Show Answer Correct Answer: B) N$^{3-}$, F$^{-}$, Na$^{+}$. 42. Which Oxide of nitrogen is known as laughing gas? A) N2O5. B) N2O. C) NO. D) NO2. Show Answer Correct Answer: B) N2O. 43. Modern periodic table has ..... periods A) 9. B) 7. C) 18. D) 11. Show Answer Correct Answer: B) 7. 44. Representative elements A) D & f. B) S & p block. C) S & d block. D) S & f block. Show Answer Correct Answer: B) S & p block. 45. What Indicates eka-Aluminium and eka-Silicon (Note eka means next) A) Gallium and Germanium. B) Germanium and Gallium. C) Boron and Carbon. D) Silicon and Phosphorus. Show Answer Correct Answer: A) Gallium and Germanium. 46. Predict the formula of the compound formed with Si and Br A) SiBr3. B) SiBr2. C) SiBr5. D) SiBr4. Show Answer Correct Answer: D) SiBr4. 47. The electronegativity value of fluorine is A) 4. B) 3. C) 2. D) 1. Show Answer Correct Answer: A) 4. 48. Which element have lowest ionization enthalpy? A) Caesium. B) Xenon. C) Iodine. D) Rubidium. Show Answer Correct Answer: A) Caesium. 49. Anything that influences the valence electrons will affect the chemistry of the element" . Which of the factors given below is not affecting the valence shell? A) Principal quantum number. B) Nuclear mass. C) No of core electrons. D) Nuclear charge. Show Answer Correct Answer: B) Nuclear mass. 50. The diagonal relationship of Li & Mg is due to A) Absence of d orbital. B) Similarity in atomic size. C) No change. D) Different ionization enthalpy. Show Answer Correct Answer: B) Similarity in atomic size. 51. Noble gases were included in Mendeleev's periodic table in the A) 1st Group. B) 7th Group. C) 8th Group. D) None of these. Show Answer Correct Answer: D) None of these. 52. The enthalpy change accompanied by the addition of an electron to neutral gaseous atom to form a negative ion is called ..... A) Electronegativity. B) Electron gain enthalpy. C) Lattice enthalpy. D) Ionisation enthalpy. Show Answer Correct Answer: B) Electron gain enthalpy. 53. The general outer electronic configuration of transition metal is A) Ns$^{0-2}$ (n-1)d$^{1-10}$. B) Ns$^{2 }$np$^{1}$ (n-1)d$^{1-10}$. C) Ns$^{2}$ np$^{6}$ (n-1)d$^{1-10}$. D) Ns$^{2 }$nd$^{1-10}$. Show Answer Correct Answer: A) Ns$^{0-2}$ (n-1)d$^{1-10}$. 54. The first synthetic element is ..... A) Hydrogen. B) Technetium. C) Zinc. D) Tungsten. Show Answer Correct Answer: B) Technetium. 55. Which of following has largest size A) F$^{-}$. B) Na$^{+}$. C) Mg$^{2+}$. D) O$^{2-}$. Show Answer Correct Answer: D) O$^{2-}$. 56. Identify the isoelectronic species from the following A) Na$^{+}$, Na. B) Ne, Mg2+. C) N$^{-}$, Na. D) Mg$^{2+}$, O$^{-}$. Show Answer Correct Answer: B) Ne, Mg2+. ← PreviousRelated QuizzesScience QuizzesClass 11 QuizzesClass 11 Chemistry (Part I) Chapter 3 Classification Of Elements And Periodicity In Properties Quiz 1Class 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