Periodic Table & Periodicity PYQs Set 2 (PDF)

Set 2 of 11 · Questions 31-60 of 327

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Periodic Table & Periodicity · Set 2 (Q31-60)
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31. $The element with the electronic configuration 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{10} 4 s^{1} is$ (1) $Cu$ (2) $Ca$ (3) $Cr$ (4) $Co$ 32. $The element Z = 114 has beeen discovered recently. It will belong to which of the following family/ group and electronic configuration ?$ (1) $Halogen family, [Rn] 5 f^{14} 6 d^{10} 7 s^{2} 7 p^{5}$ (2) $Carbon family, [Rn] 5 f^{14} 6 d^{10} 7 s^{2} 7 p^{2}$ (3) $Oxygen family, [Rn] 5 f^{14} 6 d^{10} 7 s^{2} 7 p^{4}$ (4) $Nitrogen family, [Rn] 5 f^{14} 6 d^{10} 7 s^{2} 7 p^{6}$ 33. $Which of the following elements has the maximum electron affinity?$ (1) $I$ (2) $Br$ (3) $Cl$ (4) $F$ 34. $The difference between radii of 3rd and 4th orbits of Li^{2 +} is ∆ R_{1} . The difference between the radii of 3rd and 4th orbits of H e^{+} is ∆ R_{2} . Ratio ∆ R_{1} : ∆ R_{2} is$ (1) $03:02$ (2) $08:03$ (3) $02:03$ (4) $03:08$ 35. $The atomic number of the element from the following with lowest 1^{st} ionization enthalpy is:$ (1) $32$ (2) $35$ (3) $19$ (4) $87$ 36. $Given below are two statements: Statement I: The second ionisation enthalpy of Na is larger than the corresponding ionisation enthalpy of Mg . Statement II: The ionic radius of O^{2 -} is larger than that of F^{-} . In the light of the above statements, choose the correct answer from the options given below$ (1) $Statement I is false but Statement II is true$ (2) $Both Statement I and Statement II are false$ (3) $Statement I is true but Statement II is false$ (4) $Both Statement I and Statement II are true$ 37. $The relative stability of + 1 oxidation state of group 13 elements follows the order:$ (1) $Al < Ga < Tl < In$ (2) $Tl < In < Ga < Al$ (3) $Ga < Al < In < Tl$ (4) $Al < Ga < In < Tl$ 38. $Which of the following options represents the correct ionic radii in Å of N^{3 -}, O^{2 -} and F^{-} respectively?$ (1) $1.71, 1.36 and 1.40$ (2) $1.36, 1.40 and 1.71$ (3) $1.71, 1.40 and 1.36$ (4) $1.40, 1.36 and 1.71$ 39. $The correct order of the metallic nature of the following elements is$ (1) $Si > Al > Na > Hg$ (2) $Na > Mg > Al > Si$ (3) $Al > Mg > Na > Si$ (4) $Mg > Na > Al > Si$ 40. $The first ionization potential of Na is 5.1 eV. The value of electron gain enthalpy of N a^{+} will be:$ (1) $-2.55 eV$ (2) $-5.1 eV$ (3) $-10.2 eV$ (4) $+2.55 eV$ 41. $The correct order of ionic radii for the ions, P^{3 -}, S^{2 -} C a^{2 +}, K^{+}, C l^{-} is:$ (1) $P^{3 -} > S^{2 -} > C l^{-} > K^{+} > C a^{2 +}$ (2) $C l^{-} > S^{2 -} > P^{3 -} > C a^{2 +} > K^{+}$ (3) $P^{3 -} > S^{2 -} > C l^{-} > C a^{2 +} > K^{+}$ (4) $K^{+} > C a^{2 +} > P^{3 -} > S^{2 -} > C l^{-}$ 42. $If four elements with atomic numbers Z - 2, Z - 1, Z and Z + 1 are forming isoelectronic ions, the atomic number of the ion having largest size is$ (1) $Z - 2$ (2) $Z - 1$ (3) $Z$ (4) $Z + 1$ 43. $Given below are two statements: Statement - I: Along the period, the chemical reactivity of the element gradually increases from group 1 to group 18 . Statement - II: The nature of oxides formed by group 1 element is basic while that of group 17 elements is acidic. In the the light above statements, choose the most appropriate from the questions given below:$ (1) $Both statement I and Statement II are true.$ (2) $Statement I is true but Statement II is False$ (3) $Statement I is false but Statement II is true.$ (4) $Both Statement I and Statement II is false.$ 44. $In general the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is$ (1) $Electron gain enthalpy$ (2) $Electronegativity$ (3) $Ionization enthalpy$ (4) $Atomic radius$ 45. $Three elements X, Y and Z are in the 3^{r d p er i o d} of the periodic table. The oxides of X, Y and Z respectively, are basic, amphoteric and acidic. The correct order of the atomic numbers of X, Y and Z is :$ (1) $x < z < Y$ (2) $Y < x < z$ (3) $z < Y < x$ (4) $x < Y < z$ 46. $The IUPAC name of an element with atomic number 119 is.$ (1) $Ununcotium$ (2) $Ununennium$ (3) $Unnilennium$ (4) $Unununnium$ 47. $The oxide of an element whose electronic configuration is 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1} is$ (1) $amphoteric$ (2) $basic$ (3) $acidic$ (4) $neutral.$ 48. $The IUPAC symbol for the element with atomic number 119 would be:$ (1) $uue$ (2) $une$ (3) $unh$ (4) $uun$ 49. $Among the elements Ca, Mg, P and Cl, the order of increasing atomic radii is$ (1) $Mg < C a < C 1 < P$ (2) $Cl < P < M g < C a$ (3) $P < C l < C a < M g$ (4) $Ca < M g < P < C 1$ 50. $From the following pairs of ions which one is not an isoelectronic pair?$ (1) $Na^{+}, Mg^{2 +}$ (2) $Mn^{2 +}, Fe^{3 +}$ (3) $Fe^{2 +}, Mn^{2 +}$ (4) $O^{2 -}, F^{-}$ 51. $Consider the elements N, P, O, S, Cl and F. The number of valence electrons present in the elements with most and least metallic character from the above list is respectively.$ (1) $7 and 5$ (2) $5 and 7$ (3) $5 and 6$ (4) $6 and 7$ 52. $The correct option with respect to the Pauling, electronegativity values of the elements is:$ (1) $Te > Se$ (2) $Ga < Ge$ (3) $Si < Al$ (4) $P > S$ 53. $Consider the elements and the correct increasing order of their first ionization enthalpy is:$ (1) $Al < Mg < Si < S < P$ (2) $Al < Mg < S < Si < P$ (3) $Mg < Al < Si < S < P$ (4) $Mg < Al < Si < P < S$ 54. $Which of the following arrangements represents the increasing order (smallest to largest) of ionic radii of the given species O^{2-}, S^{2-}, N^{3-}, P^{3-} ?$ (1) $O^{2-} < N^{3-} < S^{2-} < P^{3-}$ (2) $O^{2-} < P^{3-} < N^{3-} < S^{2-}$ (3) $N^{3-} < O^{2-} < P^{3-} < S^{2-}$ (4) $N^{3-} < S^{2-} < O^{2-} < P^{3-}$ 55. $The strongest reducing agent amount the following is:$ (1) $NH_{3}$ (2) $SbH_{3}$ (3) $BiH_{3}$ (4) $PH_{3}$ 56. $Starting from the 1^{st}, the successive ionisation potentials of an element are respectively 5.98, 18.8, 28.4, 120.1, 154 eV . The element is$ (1) $B$ (2) $Al$ (3) $P$ (4) $Mg$ 57. $Which of the following oxides is highly basic?$ (1) $Cr_{2} O_{3}$ (2) $Al_{2} O_{3}$ (3) $MgO$ (4) $Na_{2} O$ 58. $The bond dissociation energy is highest for$ (1) $C 1_{2}$ (2) $I_{2}$ (3) $B r_{2}$ (4) $F_{2}$ 59. $Assertion: F atom has a less negative electron affinity than Cl atom. Reason: Additional electrons are repelled more effectively by 3p electrons in Cl atom than by 2p electrons in F atom.$ (1) $Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.$ (2) $Both Assertion and Reason are true, but Reason is not correct explanation of Assertion.$ (3) $Assertion is true but Reason is false.$ (4) $Assertion is false but Reason is true.$ 60. $When the first electron gain enthalpy (Δ_{eg} H) of oxygen is - 141 kJ / mol, its second electron gain enthalpy is:$ (1) $a more negative value than the first$ (2) $almost the same as that of the first$ (3) $negative, but less negative than the first$ (4) $a positive value$