Chemical Bonding and Molecular Structure MCQ Class 11 Chemistry
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
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 BenAl2Si6O18 is
Question. Which one of the following has longest covalent bond distance?
Question. Assuming 2s-2p mixing is not operative, the paramagnetic species among the following is
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
(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) O22– > O2– > O2 > O+2
(b) O+2 > O2 > O2– > O22–
(c) O+2 > O2 < O2– > O22–
(d) O2 > O+2 > O22–> O2–
Question. K02 exhibits paramagnetic behaviour. This is due to the paramagnetic nature of
Question. Among the following, the compound that contains ionic, covalent and coordinate linkage is
Question. Ionic solids are generally
(a) good conductor of electricity
Question. Which of the following has covalent bond?
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
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?
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?
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 ?
Question. The nature of the bond in diamond is
(d) coordinate covalent
Question. Valueofxinpotashalum, K2SO4 · Alx (SO4)3 • 24H2O is
(d) None of these
Question. Sodium chloride is soluble in water but not in benzene because
(a) ΔHhdydration < ΔHlattice energy in water and ΔHhdydration > ΔHlattice energy in benzene
(b) ΔHhdydration > ΔHlattice energy in water and ΔHhdydration < ΔHlattice energy in benzene
(C) ΔHhdydration = ΔHlattice energy in water and ΔHhdydration < ΔHlattice energy in benzene
(d) ΔHhdydration < ΔHlattice energy in water and ΔHhdydration = ΔHlattice energy in benzene
Question. If Na+ ion is larger than Mg 2+ ion and S2- 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
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
(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
Question. Which of the following has lowest boiling point?
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?
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
(b) (re + ra)
(d) 1/(re + ra)
Question. The number of electrons in the valence shell of sulphur in SF6 is
Question. Born-Haber cycle may be used to calculate
(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
Question. Which one of the following is a non-polar molecule?
Question. C-C bond order in benzene is
(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
Question. Which substance has the greatest ionic character?
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
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
Question. The polarising power of the following anions, N3- , O2- and F- , follow the order
(a) N3- > F– > O2-
(b) O2-– > N3 > F–
(c) O2- > F– > N3
(d) N3– > O2- > 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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