Chemical Bonding PYQs Set 10 (PDF)

Set 10 of 17 · Questions 271-300 of 508

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Mere Teacher · Previous Year Questions NEET Chemistry · Chemical Bonding · Set 10 (Q271-300)
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271. $In a regular octahedral molecule, M X_{6} the number of X - M - X bonds at 18 0^{o} is$ (1) $three$ (2) $two$ (3) $six$ (4) $four.$ 272. $The angle between the overlapping of one s ‐orbital and one p ‐orbital is$ (1) $18 0^{o}$ (2) $12 0^{o}$ (3) $10928’$ (4) $120, 6 0^{o}$ 273. $The correct order of bond angles of the following is H_{2} O NH_{3} CH_{4} SO_{2} I II III IV$ (1) $IV > III > II > I$ (2) $IV > III > I > II$ (3) $I > II > III > IV$ (4) $I > II > IV > III$ 274. $Find out the correct order of ionic character in the following molecules. (i) SO_{2} (iii) N_{2} (ii) K_{2} O (iv) LiF$ (1) $(iv) > (ii) > (iii) > (i)$ (2) $(iv) > (ii) > (i) > (iii)$ (3) $(ii) > (iv) > (i) > (iii)$ (4) $(ii) > (iv) > (iii) > (i)$ 275. $Which of the following molecules is non-polar in nature?$ (1) $CH_{2} O$ (2) $SbCl_{5}$ (3) $NO_{2}$ (4) $POCl_{3}$ 276. $The number of antibonding electron pairs in O_{2}^{2 -} molecular ion on the basis of molecular orbital theory is (Atomic number of O is 8.)$ (1) $5$ (2) $4$ (3) $3$ (4) $2$ 277. $Which compound among the following will have a permanent dipole moment?$ (1) $Only (i)$ (2) $Only (ii)$ (3) $Only (iii)$ (4) $Only (iv)$ 278. $The correct order of hybridisation of the central atom in the following species; N H_{3}, P C l_{5} and B C l_{3} is$ (1) $d s p^{2}, s p^{2}, s p^{3}$ (2) $s p^{3}, d s p^{3}, s p^{2}$ (3) $d s p^{2}, s p^{3}, d s p^{3}$ (4) $d s p^{2}, s p^{2}, d s p^{3}$ 279. $The correct order of C - O bond length in CO, CO_{3}^{2 -}, CO_{2} is$ (1) $CO < CO_{3}^{2 -} < CO_{2}$ (2) $CO_{3}^{2 -} < CO_{2} < CO$ (3) $CO < CO_{2} < CO_{3}^{2 -}$ (4) $CO_{2} < CO_{3}^{2 -} < CO$ 280. $Match List-I with List-II: List-I Species (A) H_{3} O^{+} (B) Acetylide anion (C) N H_{4}^{+} (D) C l O_{2}^{+} List-II Geometry/Shape (I) Tetrahedral (II) Linear (III) Pyramidal (IV) Bent Choose the correct answer from the options given below:$ (1) $A(III), B(IV), C(I), D(II)$ (2) $A(III), B(I), C(II), D(IV)$ (3) $A(III), B(II), C(I), D(IV)$ (4) $A(III), B(IV), C(II), D(I)$ 281. $Identify incorrectly matched set from the following$ (1) $Molecules with incomplete octet- BeH_{2}, BCl_{3}$ (2) $Polar molecules- BF_{3}, CCl_{4}$ (3) $Molecules with expanded octet- PCl_{5}, SF_{6}$ (4) $Odd electron molecules- NO, NO_{2}$ 282. $Some of the properties of the two species, NO-3 and H3O+ are described below. Which one of them is correct?$ (1) $Dissimilar in hybridization for the central atom with different structures$ (2) $Isostructural with same hybridization for the central atom$ (3) $Isostructural with different hybridization for the central atom$ (4) $Similar in hybridiation for the central atom with different structures$ 283. $Arrange the following compounds in order of increasing dipole moment toluene (I), m-dichlorobenzene (II), o-dichlorobenzene (III), p-dichlorobenzene (IV) :$ (1) $I < IV < II < III$ (2) $IV < I < II < III$ (3) $IV < I < III < II$ (4) $IV < II < I < III$ 284. $What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : N_{2} : N_{2}^{+}; O_{2}; O_{2}^{+} ?$ (1) $0,1,2,1$ (2) $2, 1, 2, 1$ (3) $0,1,0,1$ (4) $2, 1, 0, 1$ 285. $Which of the following molecules has the maximum dipole moment?$ (1) $C O_{2}$ (2) $C H_{4}$ (3) $N H_{3}$ (4) $N F_{3}$ 286. $In the following the correct bond order sequence is:$ (1) $O_{2}^{2 -} > O_{2}^{+} > O_{2}^{-} > O_{2}$ (2) $O_{2}^{+} > O_{2}^{-} > O_{2}^{2 -} > O_{2}$ (3) $O_{2}^{+} > O_{2} > O_{2}^{-} > O_{2}^{2 -}$ (4) $O_{2} > O_{2}^{-} > O_{2}^{2 -} > O_{2}^{+}$ 287. $In ozone molecule, the formal charge on the central oxygen atom is$ (1) $-1$ (2) $+2$ (3) $0$ (4) $+1$ 288. $The correct order of the OO bond length in O_{2}, H_{2} O_{2} and O_{3} is$ (1) $O_{2} > H_{2} O_{2} > O_{3}$ (2) $H_{2} O_{2} > O_{3} > O_{2}$ (3) $O_{2} > O_{3} > H_{2} O_{2}$ (4) $O_{3} > H_{2} O_{2} > O_{2}$ 289. $For which molecules among the following, the resultant dipole moment (μ) \neq = 0 ?$ (1) $(iii) and (iv)$ (2) $(i) and (ii)$ (3) $(ii) and (iii)$ (4) $Only (iv)$ 290. $According to the Lewis formula of O_{3}, the correct option is$ (1) $σ bonds π bonds lone pairs of electrons 2 1 3$ (2) $σ bonds π bonds lone pairs of electrons 2 1 4$ (3) $σ bonds π bonds lone pairs of electrons 1 2 4$ (4) $σ bonds π bonds lone pairs of electrons 2 1 6$ 291. $Molecular shapes of S F_{4}, C F_{4} and X e F_{4} are respectively :$ (1) $the same with 2, 0 and 1 lone pair of electrons respectively.$ (2) $the same with 1, 1 and 1 lone pair of electrons respectively.$ (3) $different with 0, 1 and 2 lone pair of electrons respectively.$ (4) $different with 1, 0 and 2 lone pair of electrons respectively.$ 292. $What is the dominant intermolecular force on bond that must be overcome in converting liquid CH3OH to a gas ?$ (1) $Hydorgen bonding$ (2) $Dipole-dipole interaction$ (3) $Covalent bonds$ (4) $London dispersion force$ 293. $The number of lone pair(s) of electrons in X e O F_{4} is :$ (1) $3$ (2) $2$ (3) $1$ (4) $4$ 294. $The correct order of increasing bond angles in the following species are :$ (1) $Cl2O < ClO2 < ClO2-$ (2) $ClO2 < Cl2O < ClO2-$ (3) $Cl2O < ClO2- < ClO2$ (4) $ClO2- < Cl2O < ClO2$ 295. $What is the dominant intermolecular force or bond that must be overcome in converting liquid C H_{3} O H to a gas?$ (1) $Dipole‐dipole interaction$ (2) $Covalent bonds$ (3) $London dispersion force$ (4) $Hydrogen bonding$ 296. $Which set of the following molecules has only one lone pair of electrons on their respective central atoms? (i) SO_{2} (ii) XeF_{4} (iii) PbCl_{2} (iv) SF_{4} (v) ClF_{3}$ (1) $(i), (iii), (iv)$ (2) $(ii), (iii), (iv)$ (3) $(i), (ii), (v)$ (4) $(i), (iii), (v)$ 297. $In B r F_{3} molecule, the lone pairs occupy equatorial positions to minimize$ (1) $lone pair ‐bond pair repulsion only$ (2) $bond pair ‐bond pair repulsion only$ (3) $lone pair ‐lone pair repulsion and lone pair ‐bond pair repulsion$ (4) $lone pair ‐lone pair repulsion only$ 298. $The overlapping of orbitals in benzene is of the type$ (1) $s p^{2} - s p^{2}$ (2) $s p^{3} - s p^{3}$ (3) $sp - sp$ (4) $p - p$ 299. $Oxidation number of potassium in K_{2} O, K_{2} O_{2} & K O_{2} respectively is$ (1) $+1, +1, +1$ (2) $+1, +2, +4$ (3) $+1, +2, +2$ (4) $+1, +4,+2$ 300. $The intermolecular potential energy for the molecules A, B, C and D given below suggests that:$ (1) $A-B has the stiffest bond$ (2) $A-D has the shortest bond length$ (3) $A-A has the largest bond enthalpy$ (4) $D is more electronegative than other atoms$