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

Please refer to MCQ Questions Chapter 4 Chemical Bonding and Molecular Structure Class 11 Chemistry with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 11 Chemistry issued for the current academic year. We have provided MCQ Questions for Class 11 Chemistry for all chapters on our website. Students should learn the objective based questions for Chapter 4 Chemical Bonding and Molecular Structure in Class 11 Chemistry provided below to get more marks in exams.

Chapter 4 Chemical Bonding and Molecular Structure MCQ Questions

Please refer to the following Chapter 4 Chemical Bonding and Molecular Structure MCQ Questions Class 11 Chemistry with solutions for all important topics in the chapter.

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

Question. The hybrid state of S in SO₃ is similar to that of
(a) C in C₂H₂
(b) C in C₂H₄
(c) C in CH₄
(d) C in CO₂     

Question. A covalent molecule AB₃ has pyramidal structure. The number of lone pair and bond pair of electrons in the molecule are respectively. 
(a) 2 and 2
(b) 0 and 4
(c) 3 and 1
(d) 1 and 3         

Question. The numer of n-bonds in
CH₂ = CH—CH=CH—C≡CH is 
(a) 2
(b) 5
(c) 4
(d) 3   

Question. A lone pair of electrons in an atom implies
(a) a pair of valence electrons not involved in bonding
(b) a pair of electrons involved in bonding
(c) a pair of electrons
(d) a pair of valence electrons     

Question. The shape of XeO₂F₂ molecule is
(a) trigonal bipyramidal
(b) square planar
(c) tetrahedral
(d) see-saw     

Question. The percentage s-character of the hybrid orbitals in methane, ethene and ethyne are respectively
(a) 25, 33, 50
(b) 25, 50, 75
(c) 50, 75, 100
(d) 10, 20, 40     

Question. O₂²⁺ has a bond order of 
(a) 1
(b) 2
(c) 3
(d) 4     

Question. According to bond order concept the correct order of stability of O₂ , O⁺₂ and O^–₂ is 
(a) O₂ > O⁺₂ > O^–₂
(b) O^–₂ > O₂ > O⁺₂
(c) O₂ > O^–₂ > O⁺₂
(d) O⁺₂ > O₂ > O^–₂   

Question. Which of the following is having highest bond length?
(a) NO^–
(b) NO⁺ 
(c) CN^–
(d) CN⁺     

Question. Which one of the following species is diamagnetic in nature? 
(a) H^–₂
(b) H⁺₂
(c) H₂
(d) He⁺₂     

Question. Of the following sets which one does not contain isoelectronic species?
(a) BO^3-₃, CO^2-₃, NO^–₃
(b) SO₃²– CO^2-₃ , NO^–₃
(C) CN^– , N₂, CO^2-₂
(d) PO^3-₄ , SO₄²– ‘ CIO^–₃   

Question. The pair having similar geometry is 
(a) PCl₃, NH⁺₄
(b) BeCl², H₂O
(c) CH₄, CCl₄
(d) IF₅, PF₅         

Question. How many hydrogen bonded water molecule (s) are associated in CuSO₄ · 5H₂O 
(a) 5
(b) 1
(c) 4
(d) 3       

Question. Among the following species, identify the pair having same bond order CN^– , O^–₂, NO⁺ and CN⁺ 
(a) CN^– and O^–₂
(b) O^–₂ and NO⁺
(c) CN^– and NO⁺
(d) CN^– and CN⁺
(e) NO⁺ and CN⁺     

Question. The calculated bond order in O^–₂ ion is
(a) 1
(c) 2
(b) 1.5 
(d) 2.5       

Question. In forming (i) N₂ ➔ N⁺₂ and (ii) O2 ➔ O⁺₂ the electrons respectively are removed from 
(a) (n∗ 2p_y or n∗ 2Px) and (n∗ 2p_y or n∗ 2p_x)
(b) (n 2p_y or n 2Px) and (n 2p_y or n 2p_x)
(c) (n 2p_y or n 2Px) and (n∗ 2p_y or n∗ 2p_x)
(d) (n∗ 2p_y or n∗ 2Px) and (n 2p_y or n 2p_x)     

Question. Which is the correct statement about cr and 1t molecular orbitals ? Statements are 
I. n-bonding orbitals are ungerade
II. n-antibonding orbitals are ungerade
III. σ-antibonding orbitals are gerade
(a) Only I
(b) Only II and III
(c) Only III
(d) Only II             

Question. Which one of the following constitutes a group of the isoelectronic species?
(a) C₂^2–, O^–₂, CO, NO
(b) NO⁺, C₂^2–, CN^–, N2
(c) CN^–, N₂ , O₂^2–, C₃^2–
(d) N₂ , C₂^–, NO⁺, CO       

Question. Hydrogen bond is strongest in
(a) S—H···O
(c) F—H···F
(b) O—H···S
(d) O—H···N         

Question. Which is the most volatile compound?
(a) HI
(b) HCI
(c) HBr
(d) HF       

Question. The comparatively high boiling point of HF is due to
(a) high reactivity of fluorine 
(b) small size of hydrogen atom
(c) formation of hydrogen bonds and consequent association
(d) high IE of fluroine       

Question. Bond angle ofl 09°28′ is found in
(a) NH₃
(b) H₂O
(c) CH₅
(d) NH₄       

Question(a) AIH₃ changes to AlH₄^–
(b) H₂O changes to H₃O⁺
(c) NH₃ changes to NH₄⁺
(d) in all cases     

Question. The molecule having smallest bond angle is
(a) NCl₃
(b) AsCl₃
(c) SbCl₃
(d) PCl₃       

Question. Using Molecular Orbital Theory predict which of the following species has the shortest bond length? 
(a) O²⁺₂
(b) O⁺₂
(c) O₂^–
(d) O₂^2–   

Question. The number of nodal planes present in σ∗s -antibonding orbitals is 
(a) 1
(b) 2
(c) 0
(d) 3   

Question. RbO₂ is 
(a) peroxide and paramagnetic
(b) peroxide and diamagnetic
(c) superoxide and paramagnetic
(d) superoxide and diamagnetic     

Question. From the molecular orbital theory, one can show that the bond order in F₂ molecule as 
(a) 2
(b) 1
(c) 3
(d) 4     

Question. The correct order of bond order value among the following is
I. NO
II. NO⁺
III. NO
IV. No²⁺
V. No²
(a) I < IV < III < II < V
(b) IV= II < I < V < III
(c) V < I < IV = III < II
(d) II < III < IV < I < V     

Question. Among the following, the paramagnetic compound is
(a) Na₂O₂
(b) O₃ 
(c) N₂O
(d) KO₂   

Question. In which of the following ionisation processes, the bond order has increased and the magnetic behaviour has changed? 
(a) C₂ → C₂⁺
(b) NO → NO⁺
(c) O₂ → O;
(d) N₂ → NO₂⁺     

Question. Which of the following species exhibits the diamagnetic behaviour? 
(a) O₂^2–
(b) O₂⁺
(c) O₂
(d) NO       

Question. The isoelectronic pair is
(a) Cl₂O, ICI₂^–
(b) Cl₂^–, ClO₂
(c) IF⁺₂ , I₃^–
(d) ClO^–₂, ClF⁺₂       

Question. For a stable molecule, the value of bond order must be
(a) there is no relationship between stability and bond order 
(b) zero
(c) positive
(d) negative     

Question. Among the following, the paramagnetic compound is
(a) Na₂O₂
(b) O₃ 
(c) N₂O
(d) KO₂   

Question. In which of the following ionisation processes, the bond order has increased and the magnetic behaviour has changed? 
(a) C₂ → C₂⁺
(b) NO → NO⁺
(c) O₂ → O;
(d) N₂ → NO₂⁺     

Question. Which of the following species exhibits the diamagnetic behaviour? 
(a) O₂^2–
(b) O₂⁺
(c) O₂
(d) NO       

Question. The isoelectronic pair is
(a) Cl₂O, ICI₂^–
(b) Cl₂^–, ClO₂
(c) IF⁺₂ , I₃^–
(d) ClO^–₂, ClF⁺₂       

Question. For a stable molecule, the value of bond order must be
(a) there is no relationship between stability and bond order 
(b) zero
(c) positive
(d) negative     

Question. A molecule (X) has
I. fom sigma bonds formed by the overlap of sp² ands-orbitals
II. one sigma bond formed by sp² and sp² orbitals and
III. one n bond formed by P_x and p_z orbitals. Which of the following is X ?
(a) C₂H₆
(b) C₂H₃CI
(c) C₂H₂CI₂
(d) C₂H₄       

Question. Among the following mixtures, dipole-dipole as the major interaction, is present in 
(a) benzene and ethanol
(b) acetonitrile and acetone
(c) KCI and water
(d) benzene and carbon tetrachloride       

Question. Hydration of different ions in aqueous solution is an example of 
(a) ion-induced dipole interaction
(b) dipole-dipole interaction
(c) dipole-induced dipole interaction
(d) attractive dispersion forces between atoms     

Question. Metals are good conductors of electricity becasue they contain 
(a) ionic bonds
(b) a network structure
(c) very few valence electrons
(d) free electrons     

Question. Which one of the following molecules has the smallest bond angle? 
(a) NH₃
(b) PH₃
(c) H₂O
(d) H₂Se
(e) H₂S     

Question. The planar structure of BF³ can be explained by the fact that BF³ is 
(a) sp hybridised
(b) sp² hybridised
(c) sp³ hybridised
(d) sp³ d hybridised   

Question. The hybridisation state of central atom in PCl₅ is 
(a) sp³d
(b) sp³d²
(c) sp³
(d) d²sp³     

Question. sp³ d hybridisation results in
(a) a square planar molecule
(b) an octahedron molecule
(c) a trigonal bipyramidal molecule
(d) a tetrahedron molecule     

Question. Hybridisation of central atom in NF₃ is
(a) sp³
(b) sp
(c) sp²
(d) dsp²     

Question. The number of σ and n-bonds in a molecule of acetonitrile are respectively 
(a) 2,5
(b) 3,4
(c) 4,3
(d) 5,2     

Question. The molecular interactions responsible for hydrogen bonding in HF 
(a) ion-induced dipole
(b) dipole-dipole
(c) dipole-induced dipole
(d) ion-dipole     

Question. Which of the following is not tetrahedral ? 
(a) BF^–₄
(b) NH⁺₄
(c) CO^2-₃
(d) SO^2-₄       

Question. The hybridisation of the ipso-carbon dichlorobenzene is
(a) sp hybridised 
(b) sp² hybridised
(c) sp² d hybridised
(d) sp³ hybridised         

Question(a) dipole-dipole force
(b) London forces
(c) hydrogen bonds
(d) covalent bonds       

Question. The low density of ice compared to water is due to
(a) induced dipole-induced dipole interactions 
(b) dipole-induced dipole interactions
(c) hydrogen bonding interactions
(d) dipole-dipole interactions     

Question. The sp³ d² hybridisation of central atom of a molecule would lead to 
(a) square planar geometry
(b) tetrahedral geometry
(c) trigonal bipyramidal geometry
(d) octahedral geometry     

Question. Hybridisation of C₂ and C₃ of
          1    2   3    4     5     
    H3 C—CH=C=CH—CH₃ are
(a) sp, sp³
(b) sp², sp
(c) sp², sp²
(d) sp, sp       

Question. Hydrogen bonding is maximum in 
(a) ethyl chloride
(b) triethyl amine
(c) ethanol
(d) diethyl ether         

Question. Structure of ammonia is
(a) pyramidal
(b) tetrahedral
(c) trigonal
(d) trigonal pyramidal     

Question. In acetylene molecule between the carbon atoms there are
(a) three pi bonds 
(b) one sigma and two pi bonds
(c) two sigma and one pi bonds
(d) three sigma bonds       

Question. Consider the following molecules or ions
I. H₂O
II. NH⁺₄
III.OS²₄
IV. ClO₄
V. NH₃
sp³ hybridisation is involved in the formation of
(a) I, II and V
(b) I and II 
(c) Only II
(d) I, II, III, IV and V   

Question. lntramolecular hydrogen bond is present in 
(a) water
(b) o-nitrophenol
(c) p-nitrophenol
(d) methylamine       

Question. Consider the following compounds
I. chloroethene
II. benzene
III. 1, 3-butadiene
IV. 1, 3, 5-hexatriene
AU the carbon atoms are sp² hybridised in 
(a) I, III and IV
(b) I and II
(c) I, Il and IV
(d) I, II, III and IV   

Question. The shape of ClF₃ is 
(a) distorted T-shape
(b) pyramidal
(c) tetrahedral
(d) trigonal planar         

Question. Structure of XeF⁺5 ion is
(a) trigonal bipyramidal
(b) square pyramidal
(c) octahedral
(d) pentagonal         

Question. Hybridisation of oxygen in diethyl ether is 
(a) sp
(b) sp²
(c) sp³
(d) sp³d           

Question. The bond length between C—C bond in sp² hybridised molecule is 
(a) 1.2 Å
(b) 1.39 Å
(c) 1.33 Å
(d) 1.54 Å         

Question. The maximum number of 90° angles between bond pair-bond pair of electrons is observed in
(a) dsp³ hybridisation 
(b) sp³d hybridisation
(c) dsp² hybridisation     
(d) sp³d² hybridisation     

Question. Geometry of SiO^4-₄ anion is
(a) tetrahedral
(b) trigonal
(c) trihedral
(d) pentagonal 

Question. The pair of species having identical shapes for molecules of both species is 
(a) CF₄ , SF₄
(b) XeF₂ , CO₂
(c) BF₃ , PCl₃
(d) PF₅ , IF₅     

Question. The correct sequence of hybridisation of methane, ethene and acetylene is 
(a) sp, sp², sp³
(b) sp², sp³, sp
(c) sp³, sp², sp
(d) sp³, sp, sp²     

Question. AU bond angles are exactly equal to 109° 28′ in 
(a) methyl chloride
(b) iodoform
(c) chloroform
(d) carbon tetrachloride   

Question. The compound 1, 2-butadiene has
(a) sp, sp² and sp³ hybridised carbon atoms
(b) only sp² hybridised carbon atoms
(c) only sp hybridised carbon atoms
(d) both sp and sp² hybridised carbon atoms         

Question. The number of sigma and pi (n) bonds present in benzenerespectively are 
(a) 12, 6
(b) 6, 6
(c) 6, 12
(d) 12, 3       

Question. Which of the following molecule in its valence shell has three bond pairs of electrons and one lone pair of elctrons ?
(a) NH₃
(b) H₂O 
(c) BF₃
(d) CO₂         

Question. The hybrid state of sulphur in SO₃ molecule is
(a) sp³d
(b) sp³
(c) sp³d²
(d) sp²           

Question. Which of the following is isostructural with CO₂?
(a) N₂O
(b) NO₂
(c) N₂O₅
(d) NO       

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