Chemical Bonding PYQs Set 16 (PDF)

Set 16 of 19 · Questions 451-480 of 568

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Chemical Bonding · Set 16 (Q451-480)
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451. $Which have correct order of dipole moment :$ (1) $S O_{2} > H_{2} O$ (2) $N F_{3} > N H_{3}$ (3) $B F_{3} < N H_{3}$ (4) $S O_{2} < S O_{3}$ 452. $Four diatomic species are listed below in different sequences. Which of these presents the correct order of their increasing bond order ?$ (1) $O_{2}^{-} < NO < C_{2}^{2 -} < H e_{2}^{+}$ (2) $NO < C_{2}^{2 -} < O_{2}^{-} < H e_{2}^{+}$ (3) $C_{2}^{2 -} < H e_{2}^{+} < NO < O_{2}^{-}$ (4) $H e_{2}^{+} < O_{2}^{-} < NO < C_{2}^{2 -}$ 453. $Which of the following has unpaired electron(s)?$ (1) $N_{2}$ (2) $O_{2}^{-}$ (3) $N_{2}^{2 +}$ (4) $O_{2}^{2-}$ 454. $Hybridised states of carbon in graphite and diamond are respectively$ (1) $s p^{3}, s p^{3}$ (2) $s p^{2}, s p^{2}$ (3) $s p^{3}, s p^{2}$ (4) $s p^{2}, s p^{3}$ 455. $The correct statement for the molecule, C s I_{3}, is:$ (1) $it is a covalent molecule.$ (2) $it contains C s^{+} and I_{3}^{-}$ (3) $it contains C s^{3 +} and I¯ ions.$ (4) $it contains C s^{+}, I¯ and lattice I_{2} molecule.$ 456. $Amongst LiCl, RbCl, B e C l_{2} and M g C l_{2} the compounds with the greatest and the least ionic character respectively are:$ (1) $LiCl and RbCl$ (2) $RbCl and B e C l_{2}$ (3) $M g C l_{2} and B e C l_{2}$ (4) $RbCl and M g C l_{2}$ 457. $d^{2} s p^{3} hybridisation of the atomic orbitals gives$ (1) $square planar structure$ (2) $triangular structure$ (3) $tetrahedral structure$ (4) $octahedral structure.$ 458. $Among the following, the compound that contains ionic, covalent and coordinate linkage is$ (1) $NH_{4} Cl$ (2) $NaCl$ (3) $CaO$ (4) $NH_{3}$ 459. $Linear combination of two hybridized orbitals belonging to two atoms and each having one electron leads to the formation of$ (1) $sigma bond$ (2) $double bond$ (3) $co‐ordinate covalent bond$ (4) $pi bond.$ 460. $Which of the following is not a characteristic of a covalent compound?$ (1) $Low melting point$ (2) $No definite geometry$ (3) $Insoluble in polar solvent$ (4) $Small difference in electronegativity between the combining atoms.$ 461. $Which of the following represents the Lewis structure of N_{2} molecule?$ (1) (2) (3) (4) 462. $Which one of the following has no unpaired electrons?$ (1) $O_{2}$ (2) $O_{2}^{-}$ (3) $O_{2}^{+}$ (4) $O_{2}^{2 -}$ 463. $The dipole moments of C C l_{4}, C H C l_{3} and C H_{4} are in the order :$ (1) $C H_{4} < C C l_{4} < C H C l_{3}$ (2) $C C l_{4} < C H_{4} < C H C l_{3}$ (3) $C H C l_{3} < C H_{4} = C C l_{4}$ (4) $C H_{4} = C C l_{4} < C H C l_{3}$ 464. $Which of the following conversions involve change in both hybridization and shape ?$ (1) $C H_{4} ࢮ C_{2} H_{6}$ (2) $N H_{3} ࢮ NH_{4}^{+}$ (3) $B F_{3} ࢮ B F_{4}^{-}$ (4) $H2O ࢮ H_{3} O^{+}$ 465. $C l F_{2}^{-}, C l F_{4}^{-} find out number of lone pair and geometry.$ (1) $3 - Linear, 2 - Square planar$ (2) $3 - Square planar, 2 - Linear$ (3) $0 - Linear, 3 - Square planar$ (4) $2 - Linear, 2 - Square planar$ 466. $The shapes of SF4 and XeF2 respectively are :$ (1) $trigonal bipyramidal and trigonal bipyramidal$ (2) $see-saw and linear$ (3) $T-shape and linear$ (4) $square planar and trigonal bipyramidal$ 467. $The correct geometry and hybridization for XeF4 are -$ (1) $square planar, sp3d2$ (2) $Octahydral, sp3d2$ (3) $trigonal bipyramidal, sp3d$ (4) $planar triangle, sp3d3$ 468. $The number and type of bonds in C_{2}^{2 -} ion in CaC_{2} are:$ (1) $One σ -bond and one π -bond$ (2) $One σ -bond and two π -bonds$ (3) $Two σ -bonds and two π -bonds$ (4) $Two σ -bonds and one π -bonds$ 469. $The correct order of bond dissociation energy among N_{2}, O_{2}, O_{2}^{-} is shown in which of the following arrangements?$ (1) $N_{2} > O_{2}^{-} > O_{2}$ (2) $O_{2}^{-} > O_{2} > N_{2}$ (3) $N_{2} > O_{2} > O_{2}^{-}$ (4) $O_{2} > O_{2}^{-} > N_{2}$ 470. $Which of the following compounds contain no covalent bond ?$ (1) $KCl$ (2) $KCl, B_{2} H_{6}$ (3) $KCl, B_{2} H_{6}, P H_{3}$ (4) $KCl, H_{2} S O_{4}$ 471. $HCl gas is covalent and NaCl is an ionic compound. This is because$ (1) $sodium is highly electropositive$ (2) $hydrogen is a non-metal$ (3) $HCl is a gas$ (4) $electronegativity difference between H and Cl is less than 2.1.$ 472. $Which one of the following conversions involve change in both hybridization and shape?$ (1) $CH_{4} \to C_{2} H_{6}$ (2) $NH_{3} \to NH_{4}^{*}$ (3) $BF_{3} \to BF_{4}$ (4) $H_{2} O \to H_{3} O^{+}$ 473. $Which of the alkaline earth metal halides given below is essentially covalent in nature?$ (1) $S r C l_{2}$ (2) $C a C l_{2}$ (3) $B a C l_{2}$ (4) $M g C l_{2}$ 474. $How many of the following species have the bond order 2 ? C_{2}, B_{2}^{2 -}, N_{2}^{2 +}, CN^{+}, NO^{-}, O_{2}, C_{2}^{+}$ (1) $3$ (2) $4$ (3) $6$ (4) $5$ 475. $Assertion: Among the carbon allotropes, diamond is an insulator, Whereas, graphite is a good conductor of electricity. Reason: Hybridization of carbon in diamond and graphite are s p^{3} and s p^{2}, respectively.$ (1) $Both assertion and reason are correct, but the reason is not the correct explanation for the assertion.$ (2) $Assertion is incorrect statement, but the reason is correct.$ (3) $Both assertion and reason are correct, and the reason is the correct explanation for the assertion.$ (4) $Both assertion and reason are incorrect.$ 476. $Which one of the following does not have a pyramidal shape?$ (1) $(C H_{3})_{3} N$ (2) $(S i H_{3})_{3} N$ (3) $P (C H_{3})_{3}$ (4) $P (S i H_{3})_{3}$ 477. $Predict the correct order among the following :$ (1) $Ione pair - bond pair > bond pair - bond pair > lone pair - lone pair$ (2) $lone pair - lone pair > lone pair - bond pair > bond pair - bond pair$ (3) $lone pair - lone pair > bond pair - bond pair > lone pair - bond pair$ (4) $bond pair - bond pair > lone pair - bond pair > lone pair - lone pair$ 478. $The hybridisation of C in diamond, graphite and ethyne is in the order$ (1) $s p^{3}, sp, s p^{2}$ (2) $s p^{3}, s p^{2}, sp$ (3) $sp, s p^{2}, s p^{3}$ (4) $s p^{2}, s p^{3}, sp$ 479. $Among the following, the true statements are I. P H_{5} and B i C l_{5} donot exist. II. pπ-dπ is present in S O_{2} . III. Electrons travel with speed of light. IV. S F_{4} and C H_{4} has same shape V. I_{3}^{+} has bent shape.$ (1) $I, III$ (2) $I, II, V$ (3) $I, III, V$ (4) $I, II, IV$ 480. $Which of the following compounds contain(s) no covalent bond(s)? KCl, P H_{3}, O_{2}, B_{2} H_{6}, H_{2} S O_{4}$ (1) $KCl$ (2) $KCl, B_{2} H_{6}$ (3) $KCl, B_{2} H_{6}, P H_{3}$ (4) $KCl, H_{2} S O_{4}$