Title 1B.CHEMICAL BONDING FINAL (DN & NLR).pdf ✅

NISHITH Multimedia India (Pvt.) Ltd., 3 1 JEE MAINS - CW - VOL - I CHEMICAL BONDING NISHITH Multimedia India (Pvt.) Ltd., JEE ADVANCED - VOL-II LEVEL-VI SINGLE ANSWER QUESTIONS 1. The states of hybridization of boron and oxygen atoms in boric acid (H3 BO3 ) are respectively (A) sp3 and sp2 (B) sp2 and sp3 (C) sp2 and sp2 (D) sp3 and sp3 2. Which of the following statements are correct: (A) The bond angle of NCl3 is greater than that of NH3 . (B) The bond angle in PH3 is greater than that of PF3 . (C) ClO3  and 2 SO3  are isostructural (D) It is not necessary that in TBP structure the lone pairs always would occupy the equatorial positions. 3. The bond order in NO is 2.5 while that in NO+ is 3. Which of the following statements is true for these two species? (A) Bond length in NO+ is equal to that in NO (B) Bond length in NO is greater than in NO+ (C) Bond length in NO+ is greater than in NO (D) Bond length is unpredictable 4. Which of the following molecules/ions does not contain unpaired electrons? (A) N2 + (B) O2 (C) O2 2– (D) B2 5. The bond length of C O bond in carbon monoxide is 1.20Å and in carbon dioxide it is 1.34 Å. Then the C = O bond length in 2 CO3  will be (A) 1.95 A0 (B) 1.50 A0 (C) 1.29 A0 (D) 1.34 A0 6. Standard heat of formation of KI is –78.31 kcal mol–1. Calculate its lattice energy from following informations: 1 I (K) = 4.3eV E (I) = 73.4 1 kcal mol–1 Bond dissociation energy of I2 is 36.1 kcal/mol, sublimation energy of K is 21.51 kcal mol. (A) – 143 kcal mol–1 (B) 143kcal mol–1 (C) 14.3 kcal mol–1 (D) – 14.3 kcal mol–1 7. For which of the two compounds NOF and NO2 F one has resultant dipole moment of   1.81D and the other   0.47D . Which dipole moment do you predict ? (A) 1.81 D for NO2 F and 0.47 D for NOF (B) 0.47 D for NO2 F and 1.81 D for NOF (C) For both NO2 F and NOF dipole moment 1.81D (D) For both NO2 F and NOF dipole moment   0.47D 8. The bond order of SO2 is (A) 1.5 (B) 1.33 (C) 2.0 (D) 2.5 9. The geometry of [Ni(CO)4 ] and [Ni(PPh3 ) 2Cl2 ] are (A) both square planar (B) tetrahedral and square planar (C) both tetrahedral (D) square planar and tetrahedral. 10. The possible molecular orbital formed when two d-orbitals overlap is (A)  * (B)  (C)  * (D)  * 11. The pair of species having identical shapes for molecules of both species is (A) XeF2 , CO2 (B) BF3 , PCl3 (C) PF5 , IF5 (D) CF4 , SF4 12. A diatomic molecule has a dipole moment of 1.2 D. If the bond distance is 1.0 Å, fraction of an electronic charge on each atom is: (A) 0.25 (B) 0.33 (C) 0.66 (D) 0.90 13. Consider following pairs: (I) HNO3 and NO3 ̄ (II) H — C — H || O and H — C — O ̄ || O Which has the greater resonance stabilization? (A) NO3 ̄ in I and H — C — O ̄ || O in II (B) HNO3 in I and HCHO in II (C) NO3 ̄ in I and HCHO in II (D) HNO3 in I and H — C — O ̄ || O in II
CHEMICAL BONDING 3 2 NISHITH Multimedia India (Pvt.) Ltd., JEE ADVANCED - VOL-II NISHITH Multimedia India (Pvt.) Ltd., 14. ZnCO3 is thermally less stable than MgCO3 , because: (A) Mg(OH)2 exhibits only basic properties while Zn(OH)2 is amphoteric (B) polarising action of Zn2+ with 18–electron configuration on the anion is larger than that of Mg2+ with a noble–gas electron configuration and of same size and charge (C) both are correct (D) none of the abov 15. Which molecule is T shaped : (A) BeF2 (B) BCl3 (C) NH3 (D) ClF3 16. Match list I with list II and select the correct answer: List I (species) List II (O–N–O angle) P. NO2 + 1.180° Q. NO2 2. 132° R. NO2 – 3. 120° S. NO3 – 4. 115° 5. 109° P Q R S (A) 5 4 3 2 (B) 5 2 4 3 (C) 1 2 4 3 (D) 1 4 3 2 17. The state of hybridisation of central atom in dimer of BH3 and BeH2 is: (A) sp2 , sp2 (B) sp3 , sp2 (C) sp3 , sp3 (D) sp2 , sp3 MULTI ANSWER QUESTIONS 18. The states of hybridization of atoms in boric acid (H3 BO3 ) is (A) sp3 (B) sp2 (C) sp (D) 3 sp d 19. Which of the following compounds are expected to be covalent? (A) BeCl2 (B) SnCl4 (C) CuS (D) CaCl2 20. Which of the following does not exist? (A) HS6 (B) HPO4 (C) FeI3 (D) HClO4 21. Which of the following have 3 sp d hybridization? (A) SF4 (B) BrCl3 (C) XeOF2 (D) H O3  22. Which of the following molecules has one unpaired electron in antibonding orbitals? (A) CO (B) NO (C) – O2 (D) + O2 23. Select the correct statement(s). (A) NF3 is weaker base than NH3 (B) NO+ is more stable than O2 (C) AlCl3 has higher m.pt than AlF3 (D) SbCl3 is more covalent than SbCl5 24. Which of the following are true? (A) SH6 and BiCl5 do not exist (B) There are two p d    bonds in SO3 (C) SeF4 and CH4 are tetrahedral (D) – 3 I is linear molecule with 3 sp d hybridization 25. The hybridization, which has lone pair of electrons and shape of – 3 I is (A) It has 3 sp d hybridization (B) It has trigonal bipyramidal shape (C) It is linear (D) It has 3 lone pair of electrons 26. Which of the following show paramagnetism? (A) NO2 (B) NO (C) KO2 (D) Na2O 27. Which of the following relation is/ are correct? (A) Covalent character 1 Dipole moment  (B) Covalent  Pseudo inert configuration (C) Ionic character  Inert configuration (D) Ionic character  1 Dipole moment 28. Which of the following is /are correct for boron and nitrogen in NH3 .BF3 adduct? (A) Both has 3 sp hybrid orbitals (B) Both has tetrahedral structure (C) N is 3 sp hybridized while B is 2 sp hybridized (D) N in NH3 is pyramidal while B in BF3 is planar
NISHITH Multimedia India (Pvt.) Ltd., 3 3 JEE MAINS - CW - VOL - I CHEMICAL BONDING NISHITH Multimedia India (Pvt.) Ltd., JEE ADVANCED - VOL-II 29. Which of the following is /are correct statement(s)? (A) Probability of finding the electron in bonding molecular orbital is more than combining atomic orbitals (B) Bonding molecular orbitals are formed when same sign of orbitals are overlap (C) d–d combination of atomic orbitals gives  and  * molecular orbitals (D) p-p combination of atomic orbitals gives  and  molecular orbitals 30. Which of the following is not square planar ? (A) 2 XeF (B) 4 XeF (C) 4 XeOF (D)CH Cl 3 31. Among the following the pair in which the two species are isostructural is: (A) SiF4 and SF4 (B) IO3 ̄ and XeO3 (C) BH4 ̄ and NH4 + (D) PF6 ̄ and SF6 32. In the structure of H2CSF4 , which of the following statement is/are correct? (A) Two C–H bonds are in the same plane of axial S–F bonds. (B) Two C–H bonds are in the same plane of equitorial S–F bonds. (C) Total six atoms are in the same plane. (D) Equitorial S–F bonds are perpendicular to plane of p–bond. 33. Which of the following statements are not correct? (A) All C–O bonds in 2 3 CO are equal but not in H2CO3 . (B) All C–O bonds in  HCO2 are equal but not in HCO2H (C) C–O bond length in  HCO2 is longer than C–O bond length in 2 3 CO . (D) C–O bond length in  HCO2 and C–O bond length in 2 3 CO are equal. 34. According to MOT (Molecular Orbital Theory), the molecular orbitals are formed by mixing of atomic orbitals through LCAO (linear combination of atomic orbitals). The correct statement(s) about molecular orbitals is/are (A) :bonding molecular orbitals are formed by addition of wave-functions of atomic orbitals (B) : anti-bonding molecular orbitals are formed by subtraction of wave-functions of atomic orbitals (C) : non-bonding molecular orbitals do not take part in bond formation because they belong to inner shells (D) : anti-bonding molecular orbitals provide stability to molecules while bonding molecular orbitals make the molecules unstable. 35. Which of the following pairs is (are) isostructural? (A) 4 4 SF and SiF (B) 2 6 6 SF and SiF (C)  2 6 2 6 SiF and SeF (D)  2 6 4 6 XeO and TeF 36. N2O has a linear, unsymmetrical structure that may be thought of as a hybrid of two resonance forms. If a resonance form must have a satisficatory Lewis structure, which of the four structures shown below is the two resonance form of N2O ? (A)       N  N  O (B)        N  N  O (C)      N N  O (D)           N  N O 37. Which of the following factors are responsible for van der Waals forces ? (A) Instantaneous dipole-induced dipole interaction (B) Dipole-induced dipole interaction and ion- induced dipole interaction (C) Dipole-dipole interaction and ion-induced dipole interaction (D) Small size of molecule
CHEMICAL BONDING 3 4 NISHITH Multimedia India (Pvt.) Ltd., JEE ADVANCED - VOL-II NISHITH Multimedia India (Pvt.) Ltd., 38. Which of the following statements are correct? (A) The crystal lattice of ice is mostly formed by covalent as well as hydrogen bonds (B) The density of water increases when heated from 0o C to 4o C due to the change in the structure of the cluster of water molecules (C) Above 4o C the thermal agitation of water molecules increases. Therefore, intermolecular distance increases and water starts expanding (D) The density of water increases from 0o C to a maximum at 4o C because the entropy of the system increases 39. Select correctly matched A) 2 Cr O2 7  - two tetrahedral units are joined by their common corner B) 2 2 6 S O - centre of one tetrahedral is the corner of other tetrahedral C) 2 10 S F - two octahedral joined together D) 2 2 8 S O -two tetrahedral unit joint by their corners 40. Select correct statements A) Bond length of NO NO   B) Bond order of NO NO   C) Bond energy of NO NO   D) NO is paramagnetic but NO+ is diamagnetic 41.Which of the following statements are not correct A) All C-O bonds in 2 CO3  are equal but not inH CO 2 3 B) All C-O bonds in HCO2  are equal but not inH CO 2 3 C) C-O bond length in HCO2  is longer than C- O bond length in 2 CO3  D) C-O bond length in HCO2  and C-O bond length in 2 CO3  STATEMENTTYPE QUESTIONS The following questions consist of two statements each, Statement-I and Statement-II. You are required to choose any one of the following responses for each question : A) If both Statement-I and Statement-II are correct and Statement-II is the correct explanation of Statement-I B) If both Statement-I and Statement-II are correct and Statement-II is not the correct explanation of Statement-I C) If Statement-I is correct and Statement-II is incorrect D) If Statement-I is incorrect and Statement- II is correct 42. Statement-I : The ratio of lone pair of electron to bond pair of electron in valence shell of a molecule of IF7 is 3. Statement-II: In IF7 , I shows sp3d 3 hybridisation to attain pentagonal bipyramid geometry. 43. Statement-I : The ratio of  -bonds and - bonds in tetracyanomethane is 1. Statement-II : Tetracyanomethane has 8 and 8 bonds. 44. Statement-I : The central carbon-carbon bond in butane is larger than 1, 3-butadiene. Statement-II: More is s-character in hybridisation, lesser is bond length. 45. Statement-I : Both PCl5 and BrF5 have identical shapes. Statement-II : PCl5 has trigonal pyramidal shape whereas BrF5 has square pyramidal. 46. Statement-I : Bond order in CO+ is more than bond order in CO. Statement-II : M.O.configuration of CO is :  1s2 ,  *1s2 ,  2s2 ,  2p2 x , 2p2 y , 2p2 z ,  *2s2 . 47. Statement-I : F F \ / C C C \ F / F   has all the fluorine atoms in one plane. Statement-II : The molecule is non-polar