Periodic Table & Periodicity PYQs Set 3 (PDF)

Set 3 of 11 · Questions 61-90 of 327

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Periodic Table & Periodicity · Set 3 (Q61-90)
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61. $The correct order of ionic radii for the given species is$ (1) $Na^{+} > Al^{3 +} > Mg^{2 +} > K^{+}$ (2) $K^{+} > Na^{+} > Mg^{2 +} > Al^{3 +}$ (3) $K^{+} > Na^{+} > Al^{3 +} > Mg^{2 +}$ (4) $Al^{3 +} > Mg^{2 +} > K^{+} > Na^{+}$ 62. $The equation used to represents the electron gain enthalpy is$ (1) $X (g) + e^{-} ⟶ X^{-} (g)$ (2) $X (s) + e^{-} ⟶ X^{-} (g)$ (3) $X (g) ⟶ X^{+} (g) + e^{-}$ (4) $X (s) ⟶ X^{+} (g) + e^{-}$ 63. $Among the following, the isoelectronic specie(s) is/are (i) O^{2 -}, F^{-}, Na^{+}, Mg^{2 +} (ii) Na^{+}, Mg^{+}, Al^{3 +}, F^{-} (iii) N^{3 -}, O^{2 -}, F^{-}, Ne$ (1) $(i) and (ii)$ (2) $(i), (ii) and (iii)$ (3) $(ii) and (iii)$ (4) $(i) and (iii)$ 64. $The property of halogens which is not correctly matched is$ (1) $I > Br > Cl > F (density)$ (2) $F > Cl > Br > I (electron gain enthalpy)$ (3) $F > Cl > Br > I (ionisation enthalpy)$ (4) $F > Cl > Br > I (electronegativity)$ 65. $Which of the following series correctly represents relation between the elements from X to Y? X ® Y$ (1) $_{3} Li ®_{19} K Ionization enthalpy increases$ (2) $_{9} F ®_{35} Br Electron gain enthalpy$ (3) $_{6} C ®_{32} Ge Atomic radii increases$ (4) $_{18} Ar ®_{54} Xe Noble character increases$ 66. $Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In TI I_{3} isomorphous to CsI_{3} the metal is present in +1 oxidation state. Reason R: TI metals has fourteen f electrons in its electronic configuration. choose the most appropriate answer from the options given below:$ (1) $Both A and R are correct and is the correct explanation of A$ (2) $A is not correct but R is correct$ (3) $Both A and R are correct R is NOT the correct explanation of$ (4) $A is correct but R is not correct$ 67. $For compound having the formula G a A l C l_{4}, the correct option from the following is$ (1) $Ga is coordinated with CI in G a A l C l_{4}$ (2) $Ga is more electronegative than AI and is present as a cationic part of the salt G a A l C l_{4}$ (3) $CI forms bond with both AI and Ga in G a A l C l_{4}$ (4) $Oxidation state of Ga in the salt G a A l C l_{4} is + 3$ 68. $The first ionization enthalpy of Na, Mg and Si, respectively, are: 496, 737 and 786 kJ m o l^{- 1} . The first ionization enthalpy (kJ m o l^{- 1}) of Al is:$ (1) $487$ (2) $768$ (3) $577$ (4) $856$ 69. $The species Ar, K+ and Ca2+ contain the same number of electrons. In which order do their radii increase?$ (1) $C a^{2 +} < Ar < K^{+}$ (2) $C a^{2 +} < K^{+} < Ar$ (3) $K^{+} < Ar < C a^{2 +}$ (4) $Ar < K^{+} < C a^{2 +}$ 70. $The set representing the correct order first ionization potential is$ (1) $K > Na > Li$ (2) $Be > Mg > Ca$ (3) $B > C > N$ (4) $Ge > Si > C$ 71. $The element that does not belong to the same period of the remaining elements (modern periodic table) is:$ (1) $Iridium$ (2) $Platinum$ (3) $Osmium$ (4) $Palladium$ 72. $Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl ?$ (1) $Cl < F < O < S$ (2) $O < S < F < Cl$ (3) $F < S < O < Cl$ (4) $S < O < Cl < F$ 73. $Given below are two statements: Statement I: Fluorine has most negative electron gain enthalpy in its group. Statement II: Oxygen has least negative electron gain enthalpy in its group. In the light of the above statements, choose the most appropriate from the options given below.$ (1) $Both Statement I and Statement II are true$ (2) $Statement I is true but Statement II is false$ (3) $Both Statement I and Statement II are false$ (4) $Statement I is false but Statement II is true$ 74. $The incorrect relationship in the following pairs in relation to ionization enthalpies is:$ (1) $Mn^{2 +} < Fe^{2 +}$ (2) $Mn^{+} < Mn^{2 +}$ (3) $Mn^{+} < Cr^{+}$ (4) $Fe^{2 +} < Fe^{3 +}$ 75. $Given below are two statements: one is labelled as Assertion (a) and the other is labelled as Reason(R) Assertion (a): The ionic radii of O^{2 -} and M g^{2 +} are same. Reason (R) : Both O^{2} " and M g^{2 +} are isoelectronic species choose the correct answer from the options given below$ (1) $Both (a) and (R) are true and (R) is the correct explanation of (a)$ (2) $Both (a) and (R) are true but (R) is not the correct explanation of (a)$ (3) $(a) is true but (R) is false$ (4) $(a) is false but (R) is true$ 76. $How many of the following oxides are amphoteric? BeO, ZnO, Sb_{2} O_{3}, CO, CaO, SO_{2}, SO_{3}$ (1) $2$ (2) $3$ (3) $4$ (4) $5$ 77. $The correct orders among the following are (A) Atomic radius : B < A l < G a < I n < T l (B) Electronegativity : A l < G a < I n < T l < B (C) Density : T l < I n < G a < A l < B (D) 1st Ionization Energy : I n < A l < G a < T l < B Choose the correct answer from the options given below:$ (1) $B and D Only$ (2) $A and B Only$ (3) $C and D Only$ (4) $A and C Only$ 78. $The correct trend in the first ionization enthalpies of the elements in the 3^{rd} period of periodic table is :$ (1) $Si < S < Al < P < Cl$ (2) $Al < S < P < Si < Cl$ (3) $Al < Si < S < P < Cl$ (4) $S < Si < Al < P < Cl$ 79. $Which of the following atoms is the most electronegative?$ (1) $O$ (2) $F$ (3) $N$ (4) $Cl$ 80. $In which of the following, elements are correctly arranged in the decreasing order of their second ionization enthalpies.$ (1) $O > F > N > C$ (2) $N > O > F > C$ (3) $F > O > N > C$ (4) $C > N > O > F$ 81. $The element with Z = 120 (not yet discovered) will be an/a:$ (1) $Inner-transition metal$ (2) $Alkaline earth metal$ (3) $Alkalimetal$ (4) $Transition metal$ 82. $Among the following which one has the highest cation to anion size ratio?$ (1) $C s I$ (2) $C s F$ (3) $L i F$ (4) $N a F$ 83. $The five successive ionization enthalpies of an element are 800, 2427, 3658, 25024 and 32824 kJ mol^{- 1} . The number of valence electrons in the element is$ (1) $3$ (2) $4$ (3) $2$ (4) $5$ 84. $Given below are two statements: Statement I: The halogen that makes longest bond with hydrogen in HX, has the smallest covalent radius in its group. Statement II: A group 15 element's hydride EH_{3} has the lowest boiling point among corresponding hydrides of other group 15 elements. The maximum covalency of that element E is 4 . In the light of the above statements, choose the correct answer from the options given below$ (1) $Both Statement I and Statement II are true$ (2) $Both Statement I and Statement II are false$ (3) $Statement I is false but Statement II is true$ (4) $Statement I is true but Statement II is false$ 85. $The successive ionisation energies (starting from the 1^{st}) of anelementare 801, 2430, 3660, 25, 000 and 32, 800 kJ mol^{- 1}, respectively. The element is$ (1) $B$ (2) $C$ (3) $O$ (4) $N$ 86. $The correct order of ionisation energy of C, N, O, F is$ (1) $F < N < C < O$ (2) $C < N < O < F$ (3) $C < O < N < F$ (4) $F < O < N < C$ 87. $The number of metalloids in the following elements are Si, Mn, B, F, Cu, Ag, K, Sb, As, Na, Ge$ (1) $4$ (2) $5$ (3) $6$ (4) $7$ 88. $In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical ? (A) Rb and Cs (B) Na and K (C) Ar and Kr (D) I and At Choose the correct answer from the options given below:$ (1) $(A) and (B) only$ (2) $(B) and (C) only$ (3) $(A) and (C) only$ (4) $(C) and (D) only$ 89. $Which one of the following indicates correct order of atomic size of the given elements?$ (1) $Li > B > F > N$ (2) $N > F > Li > B$ (3) $F > N > B > Li$ (4) $Li > B > N > F$ 90. $Among the following, the number of elements showing only one non-zero oxidation state is : O, Cl, F, N, P, Sn, Tl, Na, T i$