Chemical Bonding PYQs Set 7 (PDF)

Set 7 of 17 · Questions 181-210 of 508

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Mere Teacher · Previous Year Questions NEET Chemistry · Chemical Bonding · Set 7 (Q181-210)
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181. $Statement-1 : Band gap in germanium is small, because Statement-2 : The energy spread of each germanium atomic energy level is infinitesimally small.$ (1) $Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.$ (2) $Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1$ (3) $Statement-1 is True, Statement-2 is False$ (4) $Statement-1 is False, Statement-2 is True$ 182. $In which of the following shape is same but hybridization is different:$ (1) $I C l_{2}^{-}, X e F_{2}$ (2) $S O_{2}, N O_{2}^{+}$ (3) $S O_{2}, N H_{2}^{-}$ (4) $C O_{2}, S O_{2}$ 183. $Find out the bond order in He_{2}, He_{2}^{+}, O_{2} and O_{2}^{+}, respectively$ (1) $0, 0.5, 2 and 3$ (2) $0.5, 0, 3 and 2$ (3) $0, 0.5, 2 and 1$ (4) $0, 0.5, 2 and 2.5$ 184. $In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?$ (1) $NO ⟶ NO^{+}$ (2) $O_{2} ⟶ O_{2}^{2 -}$ (3) $O_{2} ⟶ O_{2}^{+}$ (4) $N_{2} ⟶ N_{2}^{+}$ 185. $If A B_{4} molecule is a polar molecule, a possible geometry of A B_{4} is$ (1) $Tetrahedral$ (2) $Rectangular planar$ (3) $Square pyramidal$ (4) $Square planar$ 186. $Match List I with List II LIST-I (molecules/ions) (A) I F_{7} (B) I C l_{4}^{-} (C) X e F_{6} (D) X e F_{2} LIST-II (No. of lone pairs of e^{-} on central atom) I. Three II. One III. Two IV. Zero Choose the correct answer from the options given below:$ (1) $A-II,B-III,C-IV,D-I$ (2) $A-IV,B-III,C-II,D-I$ (3) $A-II, B-I, C-IV, D-III$ (4) $A-IV,B-I,C-II,D-III$ 187. $What is the best description of the change that occurs when N a_{2} O(s) is dissolved in water?$ (1) $Oxide ion accepts sharing in a pair of electrons$ (2) $Oxide ion donates a pair of electrons$ (3) $Oxidation number of oxygen increases$ (4) $Oxidation number of sodium decreases$ 188. $Given below are two statements: Statement (I): The first ionization energy of Pb is greater than that of Sn . Statement (II): The first ionization energy of Ge is greater than that of Si . choose the correct answer from the options given below:$ (1) $Statement I is false but Statement II is true$ (2) $Statement I is true but Statement II is false$ (3) $Both Statement I and Statement II are true$ (4) $Both Statement I and Statement II are false$ 189. $Given below are two statementsAssertion (A): Ionic compounds are formed by nondirectional bondsReasoning (R) : They are soluble in nonpolar solventsThe correct answer is$ (1) $Both (A) and (R) are correct and (R) is the correct explanation of (A)$ (2) $Both (A) and (R) are correct and (R) is not the correct explanation of (A)$ (3) $(A) is correct but (R) is not correct$ (4) $(A) is not correct but (R) is correct$ 190. $Which one of the following is the correct order of interactions?$ (1) $Covalent < hydrogen bonding < van der Waals’ < dipole‐dipole$ (2) $van der Waals’ < hydrogen bonding < dipole < covalent$ (3) $van der Waals’ < d i p o l e - dipole < hydrogen bonding < covalent$ (4) $Dipole‐dipole < v an der Waals’ < hydrogen bonding < covalent.$ 191. $In which of the following ionization processes the bond energy increases and the magnetic behaviour changes from paramagnetic to diamagnetic.$ (1) $O_{2} \to O_{2}^{+}$ (2) $C_{2} \to C_{2}^{+}$ (3) $N O \to N O^{+}$ (4) $N_{2} \to N_{2}^{+}$ 192. $As per molecular orbital theory the pair of molecules which do not exist is$ (1) $Li_{2}, B_{2}$ (2) $He_{2}, C_{2}$ (3) $Be_{2}, C_{2}$ (4) $Be_{2}, Ne_{2}$ 193. $The tetra atomic molecules/ions with different shapes are$ (1) $TeCl_{4}, SeF_{4}$ (2) $CH_{4}, PCl_{4}^{+}$ (3) $SF_{4}, NH_{4}^{+}$ (4) $SiH_{4}, CCl_{4}$ 194. $Given below are two statements: One is labelled as Assertion A and the other labelled as Reason R. Assertion A: Lithium halides are some what covalent in nature. Reason R: Lithium possess high polarization capability In the light of the above statements choose the most appropriate answer from the options given below:$ (1) $A is true but R is false$ (2) $A is false but R is true$ (3) $Both A and R are true but R is NOT thecorrect explanation of A.$ (4) $Both A and R are true and R is the correct explanation of A.$ 195. $Dipole-induced dipole interactions are present between which of the following pairs?$ (1) $H_{2} O and C_{2} H_{5} OH$ (2) $Cl_{2} and CCl_{4}$ (3) $NH_{3} and H_{2}$ (4) $SiF_{4} and BF_{3}$ 196. $Assertion (A) : Xe atoms in XeF2 are d^{2} s p^{3} hybridised. Reason (R) : XeF2 molecule does not follow octet rule. Which of the following is correct?$ (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) $(A) is false but (R) is true$ 197. $The correct order of increasing intermolecular hydrogen bond strength is$ (1) $HCN < H_{2} O < N H_{3}$ (2) $HCN < C H_{4} < N H_{3}$ (3) $C H_{4} < HCN < N H_{3}$ (4) $C H_{4} < N H_{3} < HCN$ 198. $Match List I with List II: List I (Complexes) (A) [Ni(CO)_{4}] (B) [Cu(N H_{3})_{4}]^{2 +} (C) [Fe(N H_{3})_{6}]^{2 +} (D) [Fe(H_{2} 0)_{6}]^{2 +} List II (Hybridisation) I._{S} p^{3} II. d s p^{2} III. s p^{3} d^{2} IV. d^{2} s p^{3}$ (1) $A-II,B-I,C-III,D-IV$ (2) $A-I,B-II,C-III,D-IV$ (3) $A-II,B-I,C-IV,D-III$ (4) $A-I, B-II,C-IV,D-III$ 199. $Among SO_{2}, NF_{3}, NH_{3}, XeF_{2}, ClF_{3} and SF_{4}, the hybridization of the molecule with nonzero dipole moment and highest number of lone-pairs of electrons on the central atom is$ (1) $sp^{3}$ (2) $dsp^{2}$ (3) $sp^{3} d^{2}$ (4) $sp^{3} d$ 200. $For a stable molecule the value of bond order must be$ (1) $zero$ (2) $positive$ (3) $negative$ (4) $there is no relationship between stability and bond order.$ 201. $Match Lis-I with List-II. List-I (A) Weak intermolecular forces of attraction (B) Hydrogen bonding (C) Heavily branched polymer (D) High density polymer List-II (I)Hexamethylenediamine + adipic acid (II) A l E t_{3} + T i C l_{4} (III) 2 - chloro -1, 3 - butadiene (IV) Phenol + formaldehyde Choose the correct answer from the options given below$ (1) $A-IV, B-II, C-III, D-I$ (2) $A-IV, B-I, C-III, D-II$ (3) $A-II, B-IV, C-I, D-III$ (4) $A-III,B-I,C-IV,D-II$ 202. $The number of 2-centre-2-electron and 3-centre-2-electron bonds in B_{2} H_{6}, respectively, are:$ (1) $2 and 4$ (2) $2 and 2$ (3) $4 and 2$ (4) $2 and 1$ 203. $H_{2} O has a net dipole moment while B e F_{2} has zero dipole moment because$ (1) $H_{2} O molecule is linear while B e F_{2} is bent$ (2) $B e F_{2} molecule is linear while H_{2} O is bent$ (3) $fluorine has more electronegativity than oxygen$ (4) $beryllium has more electronegativity than oxygen.$ 204. $Which of the following orders are correct against the property given? (i) Dipole moment NF_{3} > NH_{3} > BF_{3} (ii) Covalent bond length C - O > N - O > O - H (iii) Bond order C_{2} > B_{2} > He_{2}$ (1) $i, ii only$ (2) $ii, iii only$ (3) $i, iii only$ (4) $i, ii, iii$ 205. $Which contains both polar and non-polar bonds?$ (1) $N H_{4} Cl$ (2) $HCN$ (3) $H_{2} O_{2}$ (4) $C H_{4}$ 206. $Consider the molecules CH4, NH3 and H2O. Which of the given statement is false ?$ (1) $The H-C-H bond angle is CH4 is larger than the H-N-H bond angle is NH3$ (2) $The H-C-H bond angle is CH4 the H-N-H bond angle in NH3 and the H-O-H bond angle in H2O are all greater than 90º.$ (3) $Then H-O-H bond angle in H2O is larger than the H-C-H bond angle in CH4$ (4) $The H-O-H bond angle in H2O is smaller than the H-N-H bond angle in NH3$ 207. $Amongst the following the acid having -O-O- bond is:$ (1) $H_{2} S_{2} O_{3}$ (2) $H_{2} S_{2} O_{5}$ (3) $H_{2} S_{2} O_{6}$ (4) $H_{2} S_{2} O_{8}$ 208. $Which among the following molecules is (a) involved in sp^{3} d hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?$ (1) $XeF_{4}$ (2) $XeF_{2}$ (3) $PF_{5}$ (4) $SF_{4}$ 209. $The correct order of C‐O bond length among CO, C O_{3}^{2 -}, C O_{2} is$ (1) $C O < C O_{3}^{2 -} < C O_{2}$ (2) $C O_{3}^{2 -} < C O_{2} < C O$ (3) $CO < C O_{2} < C O_{3}^{2 -}$ (4) $C O_{2} < C O_{3}^{2 -} < C O$ 210. $Which of the following are isostructural pairs? (A) S O_{4}^{2 -} and Cr O_{4}^{2 -} (B) SiC l_{4} and TiC l_{4} (C) N H_{3} and N O_{3}^{-} (D) BC l_{3} and BrC l_{3}$ (1) $A and C only$ (2) $A and B only$ (3) $B and C only$ (4) $C and D only$