Please refer to Chapter 4 Chemical Bonding and Molecular Structure MCQ Class 11 Chemistry with answers below. These multiple-choice questions have been prepared based on the latest NCERT book for Class 11 Chemistry. Students should refer to MCQ Questions for Class 11 Chemistry with Answers to score more marks in Grade 11 Chemistry exams. Students should read the chapter Chemical Bonding and Molecular Structure and then attempt the following objective questions.

MCQ Questions Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure

The Chemical Bonding and Molecular Structure MCQ Class 11 Chemistry provided below covers all important topics given in this chapter. These MCQs will help you to properly prepare for exams.

Question. A coordinate bond is a dative covalent bond. Which of the below is true ? 
(a) Three atom form bond by sharing their electrons
(b) Two atoms form bond by sharing their electrons
(c) Two atoms form bond and one of them provides both electrons
(d) Two atoms form bond by sharing electrons obtained from third atom.   

Question. During the formation of a chemical bond 
(a) electron-electron repulsion becomes more than thenucleus-electron repulsion attraction
(b) energy of the system does not change
(c) energy increases
(d) energy decreases         

Question. Which of the followng forms stable coordinate bonds?
(a) NH₃, H₂0 
(b) NH₃, BF₃
(c) NaOH, HCl
(d) BF₃, BCl₃     

Question. An elements has 8 electrons in its last shell which of the following is correct? 
(a) It will lost electrons
(b) It will gain electrons
(c) It neither gain nor lose electrons
(d) None of the above     

Question. Among the following the maximum covalent character is shown by the compound 
(a) FeCl₂
(b) SnCl₂
(c) AlCl₃
(d) MgCl₂     

Question. NH₃ and BF₃ form an adduct readily because they form
(a) a coordinate bond 
(b) a hydrogen bond
(c) an ionic bond
(d) a covalent bond       

Question. The valueofnin the molecular forrnula Be_nAl₂Si₆O1₈ is
(a) l
(b) 2
(c) 3
(d) 4       

Question. Which one of the following has longest covalent bond distance? 
(a) C—C
(b) C—H
(c) C—N
(d) C—O   

Question. Assuming 2s-2p mixing is not operative, the paramagnetic species among the following is
(a) Be₂
(b) B₂
(c) C₂
(d) N₂     

Question. Order of species CF⁺ , CF and CF^– according to increasing C—F bond length 
(a) CF⁺ < CF < CF^–
(b) CF⁺ < CF^– < CF
(c) CF^– < CF < CF⁺
(d) CF < CF^– < CF⁺     

Question. An atomic orbital has two angular nodes and one radial node. It is a 
(a) 2p orbital
(b) 3p orbital
(c) 3d orbital
(d) 4d orbital     

Question. The number of angular and radial nodes of 4s orbital respectively are 
(a) 3, 1
(b) 1, 2
(c) 0,3
(d) 2, 1     

Question. In case ofheteronuclear diatom of the type AB, where A is more electronegative than B, bonding molecular orbital resembles the character of A more than that of B. The statement 
(a) is false
(b) is true
(c) cannot be evaluated since data is not sufficient
(d) is true only for certain systems         

Question. Which of the following stability order is correct 
(a) O₂^2– > O₂^– > O₂ > O⁺₂
(b) O⁺₂ > O₂ > O₂^– > O₂^2–
(c) O⁺₂ > O₂ < O₂^– > O₂^2–
(d) O₂ > O⁺₂ > O₂^2–> O₂^–         

Question. K02 exhibits paramagnetic behaviour. This is due to the paramagnetic nature of 
(a) KO^–
(b) K⁺
(c) O₂
(d) O₂^–   

Question. Among the following, the compound that contains ionic, covalent and coordinate linkage is
(a) NH₃
(b) NH₄Cl
(c) NaCl
(d) CaO       

Question. Ionic solids are generally
(a) good conductor of electricity
(b) soft
(c) volatile
(d) brittle     

Question. Which of the following has covalent bond? 
(a) Na₂S
(b) AJCl₃
(c) NaH
(d) MgCl₂     

Question. The bond length of HCI molecule is 1.275 Å and its dipole moment is 1.03 D. The ionic character of the molecule (in per cent) (charge of the electron= 4.8 x 10^-10 esu) is
(a) 100
(b) 67.3
(c) 33.66
(d) 16.83         

Question. The bond angle and dipole moment of water respectively, are 
(a) 109.5°, 1.84 D
(c) 104.5°, 1.84 D
(b) 107.5°, 1.56 D
(d) 102.5°, 1.56 D         

Question. C—Cl bond is stronger than C—I bond, because
(a) C—Cl bond is more ionic than C—I
(b) C—Cl bond is polar covalent bond
(c) C—Cl bond is more covalent than C—I
(d) C—Cl bond length is longer than C—I       

Question.Which one of the following contains ionic, covalent and coordinate bonds? 
(a) NaCl
(c) NaNC
(b) NaCN
(d) NaOH     

Question. Which of the following when dissolved in water forms a solution, i.e. non-conducting? 
(a) Chile saltpetre
(b) Potash alum
(c) Green vitriol
(d) Ethyl alcohol     

Question. Which of the following is a non-directional bond? 
(a) Covalent bond 
(b) Metallic bond
(c) Coordinate bond
(d) All are directional 

Question. When a metal atom combines with a non-metal atom, the non-metal atom will
(a) lose electrons and decrease in size
(b) lose electrons and increase in size
(c) gain electrons and decrease in size
(d) gain electrons and increase in size     

Question. Which one of the following has a coordinate bond?
(a) NH₄Cl
(b) AlCl₃ 
(c) NaCl
(d) Cl₂       

Question. Which combination of atoms can form a polar covalent bond? 
(a) Hand H
(b) Hand Br
(c) N and N
(d) Na and Br     

Question. Which metal has a greater tendency to form metal oxide ?
(a) Cr
(b) Fe
(c) Al
(d) Ca     

Question. The nature of the bond in diamond is 
(a) ionic
(b) covalent
(c) metallic
(d) coordinate covalent   

Question. Valueofxinpotashalum, K₂SO₄ · Al_x (SO₄)₃ • 24H₂O is 
(a) 4
(b) 1
(c) 2
(d) None of these     

Question. Sodium chloride is soluble in water but not in benzene because 
(a) ΔH_hdydration < ΔH_{lattice energy in water} and ΔH_hdydration > ΔH_{lattice energy in benzene}
(b) ΔH_hdydration > ΔH_{lattice energy in water} and ΔH_hdydration < ΔH_{lattice energy in benzene}
(C) ΔH_hdydration = ΔH_{lattice energy in water} and ΔH_hdydration < ΔH_{lattice energy in benzene}
(d) ΔH_hdydration < ΔH_{lattice energy in water} and ΔH_hdydration = ΔH_{lattice energy in benzene}       

Question. If Na+ ion is larger than Mg ²⁺ ion and S^2- is larger than Cl ^– ion, which of the following will be least soluble in water?
(a) Sodium chloride
(b) Sodium sulphide
(c) Magnesium chloride
(d) Magnesium sulphide       

Question. Lattice energy of a solid increases, if
(a) size of ions is small 
(b) charges of ions are small
(c) ions are neutral
(d) None of the above     

Question. Dipole moment is shown by
(a) cis- 1, 2-dichloro ethene
(b) trans-1, 2-dichloro ethene
(c) trans-I 2-dichloro-2 pentene
(d) Both (a) and (c)         

Question. The molecule having largest dipole moment among the following is 
(a) CHI₃
(b) CH₄
(c) CHCl₃
(d) CCl₄           

Question. The charge/size ratio of a cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of the cationic speci·e s, K⁺ , Ca²⁺ , Mg²⁺ , Be²⁺ ?
(a) Mg²⁺ < Be²⁺ < K⁺< Ca²⁺
(b) Be²⁺ < K⁺< Ca²⁺ < Mg²⁺
(c) K⁺ < Ca²⁺ < Mg²⁺ < Be²⁺
(d) Ca²⁺ < Mg²⁺ < Be²⁺ < K⁺     

Question. A compound contains X, Y and Z atoms. The oxidation states of X , Y and Z are +2, + 2 and – 2 , respectively. The possible fommla of the compound is 
(a) XYZ₂
(b) Y₂ (XZ₃)₂
(c) X₃ (Y₄Z)₂
(d) X₃ (YZ₄)₃           

Question. An atom of an element A has three electrons in its outermost orbit and that of B has six electrons in its outermost orbit. The formula of the compound between these two will be 
(a) A₃B₆
(b) A₂B₃
(c) A₃B₂
(d) A₂B       

Question. Which of the following has lowest boiling point?
(a) NaCl
(b) CuCl
(c) CuCl₂ 
(d) CsCl     

Question. Lattice energy of an ionic compound depends upon
(a) charge on the ion and size of the ion
(b) packing of ions only
(c) size of the ion only 
(d) charge on the ion only     

Question. Which of the following silver salts is insoluble in water?
(a) AgClO₄
(b) Ag₂SO₄ 
(c) AgF
(d) AgNO₃       

Question. AB is an ionic solid. The ionic radii of A+ and s- are respectively re and r0 • Lattice energy of AB is proportional to
(a) r_e/r_a
(b) (r_e + r_a)
(c) r_a/r_e
(d) 1/(r_e + r_a)         

Question. The number of electrons in the valence shell of sulphur in SF₆ is 
(a) 12
(b) 10
(c) 8
(d) 11     

Question. Born-Haber cycle may be used to calculate
(a) electronegativity
(c) oxidation number
(b) mass number
(d) electron affinity       

Question. IfH-X bond length is 2.00 Å and H-X bond has dipole moment 5 .12 x 10^-30 cm, the percentage of ionic character in the molecule will be 
(a) 10%
(b) 16%
(c) 18%
(d) 20%     

Question. Which one of the following is a non-polar molecule?
(a) CCl₄
(b) CHCl₃ 
(c) CH₂Cl₂
(d) CH₃Cl   

Question. C-C bond order in benzene is
(a) l
(b) 2
(c) between 1 and 2
(d) None of these     

Question. Which of the following is a favourable factor for cation formation ?
(a) Low ionisation potential
(b) High electron affinity
(c) High electonegativity
(d) Small atomic size         

Question. Allene (C₃ H₄ )contains 
(a) one double bond, one triple bond and one single bond
(b) one triple and two double bonds
(c) two triple and one double bond
(d) two double and four single bond       

Question. A diatomic molecule has a dipole moment of 1.2 D. If its bond distance of 1.0 Å, what fraction of an electronic charge, e, exist on each atom? 
(a) 25% of e
(b) 50% of e
(c) 60% of e
(d) 75% of e         

Question. The molecule which has zero moment is 
(a) CH₃CI
(b) NF₃
(c) BF₃
(d) ClO₂       

Question. Which substance has the greatest ionic character?
(a) Cl₂O
(b) NCl₃
(c) PbCl₂
(d) BaCl₂           

Question. The dipole moment of HBr is 1.6 x 1 o-3o cm and interatomic spacing is l A. The percentage ionic character of HBr is 
(a) 7
(b) 10
(c) 15
(d) 27       

Question. If the molecule of HCl were totally polar, the expected value of dipole moment is 6.12 D (debye), but the experimental value of dipole moment was 1.03 D. Calculate the percentage ionic character 
(a) 17
(b) 83
(c) 50
(d 90 

Question. The polarising power of the following anions, N^3- , O^2- and F- , follow the order 
(a) N^3- > F^– > O^2-
(b) O^2-– > N³ > F^–
(c) O^2- > F^– > N³
(d) N³– > O^2- > F^–     

Question. In the following electron-dot structure,calculate the formal charge from left to right nitrogen atom, 
..           ..
N = N = N
..           ..   
(a) -1,-1,+ 1
(b) -1, + 1, -1
(c) + l, – 1,-1
(d) + 1, – 1, + 1     

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