Chemical Bonding PYQs Set 4 (PDF)

Set 4 of 19 · Questions 91-120 of 568

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Chemical Bonding · Set 4 (Q91-120)
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91. $Of the species, NO, N O^{+}, N O^{2 +} and N O^{-}, the one with minimum bond strength is$ (1) $N O^{-}$ (2) $N O^{2 +}$ (3) $N O^{+}$ (4) $NO$ 92. $Which of the following molecules can be represented as A B_{2} E_{2}, where A -central atom, B -bond pairs of electrons, E -lone pairs of electrons?$ (1) $SO_{2}$ (2) $H_{2} O_{2}$ (3) $H_{2} O$ (4) $XeF_{2}$ 93. $In the molecular orbital diagram for the molecular ion, N_{2}^{+}, the number of electrons in the σ 2p molecular orbital is:$ (1) $0$ (2) $2$ (3) $3$ (4) $1$ 94. $Which of the following pairs of molecules is isostructural?$ (1) $HgCl_{2}, SO_{2}$ (2) $SnCl_{2}, PbCl_{2}$ (3) $SF_{4}, XeF_{4}$ (4) $NH_{3}, SO_{3}$ 95. $In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed ?$ (1) $O_{2} \to O_{2}^{+}$ (2) $N_{2} \to N_{2}^{+}$ (3) $C_{2} \to C_{2}^{+}$ (4) $N O \to N O^{+}$ 96. $The correct order of H - N - H bond angles of ammonia, ammonium ion and amide are$ (1) $NH_{2}^{-} > NH_{3} > NH_{4}^{+}$ (2) $NH_{4}^{+} > NH_{3} > NH_{2}^{-}$ (3) $NH_{3} > NH_{2}^{-} > NH_{4}^{+}$ (4) $NH_{3} > NH_{4}^{+} > NH_{2}^{-}$ 97. $The bond order in NO is 2.5 while that in N O^{+} is 3. Which of the following statements is true for these two species?$ (1) $Bond length in N O^{+} is greater than in NO$ (2) $Bond length in NO is greater than in N O^{+}$ (3) $Bond length in N O^{+} is equal to that in NO$ (4) $Bond length is unpredictable$ 98. $Which of the following have linear strcuture? I. SnCl_{2} II. BeF_{2} III. SO_{2} IV. N + O_{2} V. C_{2} H_{2}$ (1) $I, II, IV$ (2) $II, IV, V$ (3) $II, III, IV$ (4) $I, IV, V$ 99. $The species having pyramidal shape according to VSEPR theory is$ (1) $SO_{3}$ (2) $BrF_{3}$ (3) $SiO_{3}^{2 -}$ (4) $OSF_{2}$ 100. $Which of the following structures is the most preferred and hence of lowest energy for SO3 ?$ (1) (2) (3) (4) 101. $Which species does not exhibit Paramagnetism?$ (1) $N_{2}^{+}$ (2) $O_{2}^{-}$ (3) $CO$ (4) $NO$ 102. $Match List-I with List-II. List-I (A) PCl_{5} (B) SF_{6} (C) BrF_{5} (D) BF_{3} List-II (I) Square pyramidal (II) Trigonal planar (III) Octahedral (IV) Trigonal bipyramidal Choose the correct answer from the options given below.$ (1) $A-II B-III C-IV D-I$ (2) $A-III B-I C-IV D-II$ (3) $A-IV B-III C-II D-I$ (4) $A-IV B-III C-I D -II$ 103. $In which one of the following pairs the two species have identical shape, but differ in hybridisation?$ (1) $I_{3}^{-}, BeCl_{2}$ (2) $NH_{3}, BF_{3}$ (3) $XeF_{2}, l_{3}^{-}$ (4) $NH_{4}^{+}, SF_{4}$ 104. $The pair of species that has the same bond order in the following is$ (1) $CO, N O^{+}$ (2) $NO, C N^{-}$ (3) $O_{2}, N_{2}$ (4) $O_{2}, B_{2}$ 105. $The charge/ size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of these cationic species, K^{+}, C a^{2 +}, M g^{2 +}, B e^{2 +} ?$ (1) $K^{+} < C a^{2 +} < M g^{2 +} < B e^{2 +}$ (2) $C a^{2 +} < M g^{2 +} < B e^{2 +} < K^{+}$ (3) $M g^{2 +} < B e^{2 +} < K^{+} < C a^{2 +}$ (4) $B e^{2 +} < K^{+} < C a^{2 +} < M g^{2 +}$ 106. $Among the following, the molecule expected to be stabilized by anion formation is: C_{2}, O_{2}, NO, F_{2}$ (1) $C_{2}$ (2) $F_{2}$ (3) $NO$ (4) $O_{2}$ 107. $Highest covalent character is found in which of the following?$ (1) $CaF_{2}$ (2) $CaCl_{2}$ (3) $CaBr_{2}$ (4) $Cal_{2}$ 108. $How many of the following species are diamagnetic? He_{2}^{+}, H_{2}, H_{2}^{+}, H_{2}^{-}, He$ (1) $1$ (2) $2$ (3) $3$ (4) $0$ 109. $Given below are two statements; one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : PH3 has lower boiling point than NH3. Reason (R) : In liquid state NH3 molecules are associated through vander waal's forces, but PH3 molecules are associated through hydrogen bonding. In the light of the above statements, choose the most appropriate answer from the options given below:$ (1) $Both (A) and (R) are correct and (R) is not the correct explanation of (A)$ (2) $(A) is not correct but (R) is correct$ (3) $Both (A) and (R) are correct but (R) is the correct explanation of (A)$ (4) $(A) is correct but (R) is not correct$ 110. $Which is the right structure of X e F_{4} ?$ (1) (2) (3) (4) 111. $According to molecular orbital theory, which one of the following statements about the molecular species O_{2}^{+} is correct?$ (1) $It is paramagnetic and has less bond order than O_{2}$ (2) $It is paramagnetic and more bond order than O_{2}$ (3) $It is diamagnetic and has less bond order than O_{2}$ (4) $It is diamagnetic and has more bond order than O_{2}$ 112. $During change of O_{2} to O_{2}^{-} ion, the electron adds on which one of the following orbitals?$ (1) $π^{} orbital$ (2) $π orbital$ (3) $σ orbital$ (4) $σ orbital$ 113. $The correct order of boiling point in the following compounds is$ (1) $HF > H_{2} O > NH_{3}$ (2) $H_{2} O > HF > NH_{3}$ (3) $NH_{3} > H_{2} O > HF$ (4) $NH_{3} > HF > H_{2} O$ 114. $Which of the following is not isostructural with S i C 1_{4} ?$ (1) $N H_{4}^{+}$ (2) $S C l_{4}$ (3) $S O_{4}^{2 -}$ (4) $P O_{4}^{3 -}$ 115. $The percentage of s"character in the hybrid orbitals of nitrogen in NO_{2}^{+}, NO_{3} and NH_{4}^{+} respectively are$ (1) $33.3 %, 25 %, 50 %$ (2) $50 %, 33.3 %, 25 %$ (3) $25 %, 50 %, 33.3 %$ (4) $33.3 %, 50 %, 25 %$ 116. $In graphite and diamond, the percentage of p-characters of the hybrid orbitals in hybridization are respectively$ (1) $33 and 25$ (2) $67 and 75$ (3) $50 and 75$ (4) $33 and 75$ 117. $The predominant intermolecular forces present in ethyl acetate, a liquid, are:$ (1) $H - bond, London dispersion$ (2) $dipole-dipole interation, H -bond$ (3) $dipole-dipole interation, London dispersion$ (4) $H -bond, dipole-dipole interation, London dispersion$ 118. $Number of molecules having bond order 2 from the following molecules is _______C_{2}, O_{2}, Be_{2}, Li_{2}, Ne_{2}, N_{2}, He_{2}$ 119. $Number of compounds from the following with zero dipole moment is_____HF, H_{2}, H_{2} S, CO_{2}, NH_{3}, BF_{3}, CH_{4}, CHCl_{3}, SiF_{4}, H_{2} O, BeF_{2}$ 120. $The hybridization of P exhibited in P F_{5} is s p^{x} d^{y} . The value of y is__________.$