CBSE Class 11 Chemistry Chemical Bonding And Molecular Structure Worksheet Set A

Chemical Bonding MCQ Questions with Answers Class 11 Chemistry

Chemical Bonding and Molecular Structure MCQ Questions with Answers Class 11 Chemistry 

Question. Which of the following species has a linear shape? 

(1) O₃ 

(2) NO₂^– 

(3) SO₂ 

(4) NO₂⁺ 

Answer (4)

Question. Which of the following species contains three bond pairs and one lone pair around the central atom? 

(1) 2NH₂^– 

(2) PCl₃ 

(3) H₂O 

(4) BF₃ 

Answer (2)

Question. The geometry of electron pairs around S in SF₆ is 

(1) Octahedral 

(2) Trigonal bipyramidal 

(3) Square pyramida 

(4) Pentagonal planar 

Answer (1)

Question. Which of the following bonds has the highest bond energy? 

(1) S–S 

(2) O–O 

(3) Se–Se 

(4) Te–Te 

Answer (1)

Question. Which compound has planar structure? 

(1) XeF₄ 

(2) XeOF₂ 

(3) XeO₂F₂ 

(4) XeO₄ 

Answer (1)

Question. In which of the following bond angle is maximum? 

(1) NH₃ 

(2) NH₄+ 

(3) PCl₃ 

(4) SCl₂ 

Answer (2)

Question. The BCl₃ is a planar molecule whereas NCl 3 is pyramidal because 

(1) Nitrogen atom is smaller than boron atom 

(2) BCl ₃ has no lone pair but NCl 3 has a lone pair of electrons 

(3) B – Cl bond is more polar than N – Cl bond 

(4) N – Cl bond is more covalent than B – Cl bond 

Answer (2) 

Question. Which one of the following statements is not correct for sigma- and pi-bonds formed between two carbon atoms? 

(1) Sigma-bond is stronger than a pi-bond 

(2) Bond energies of sigma- and pi-bonds are of the order of 264 kJ/mol and 347 kJ/mol, respectively 

(3) Free rotation of atoms about a sigma-bond is allowed but not in case of a pi-bond 

(4) Sigma-bond determines the direction between carbon atoms but a pi-bond has no effect in this regard 

Answer (2)

Question. In BrF ₃ molecule, the lone pairs occupy equatorial positions to minimize 

(1) Lone pair-bond pair repulsion only 

(2) Bond pair-bond pair repulsion only 

(3) Lone pair-lone pair repulsion and lone pair-bond pair repulsion 

(4) Lone pair-lone pair repulsion only 

Answer (3)

Question. The low density of ice compared to water is due to 

(1) Dipole-induced dipole interactions 

(2) Induced dipole induced dipole interactions 

(3) Hydrogen bonding interactions 

(4) Dipole-dipole interactions 

Answer (3)

Question. Which of the following would have a permanent dipole moment? 

(1) SiF₄ 

(2) SF₄ 

(3) XeF₄ 

(4) BF₃ 

Answer (2)

Chemical Bonding and Molecular Structure MCQ Questions with Answers Class 11 Chemistry

Question. Which of the following molecules has the maximum dipole moment? 

(1) CO₂

(2) CH₄

(3) NH₃

(4) NF₃

Answer (3)

Question.Incorrect statement regarding hybridization is

(1) It is not possible for isolated atoms

(2) Number of hybrid orbital formed is same as the number of orbitals combining

(3) Only the half filled orbitals and fully filled orbitals can participate not the empty orbital

(4) It is not a real physical process

Answer (3)

Question.Which of the following statements are correct?

I. Bond order of NO is 2.5

II. Bond order of NO⁺ is 3.0

III. Bond order of O₂ is 1.5

IV. Bond order of CO is 3.0

(1) I, II, III (2) II, III, IV (3) I, II, IV (4) II, IV

Answer (3)

Question.How many bonds are formed by each oxygen atom in ice?

(1) 4

(2) 2

(3) 3

(4) May be 1 or 2

Answer (1)

Question.Which molecule contains both polar and non-polar covalent bond?

(1) NH₄⁺

(2) HCl

(3) CH₄

(4) H₂O₂

Answer (4)

Question. o-nitrophenol is

(1) More volatile than p-nitrophenol

(2) Less volatile than p-nitrophenol

(3) Equally volatile as p-nitrophenol

(4) Non-volatile

Answer (1)

Question.Number of angles of 109°28 is present in CCl ₄

(1) 2

(2) 4

(3) 6

(4) 8

Answer (3)

Question.Which of the following molecule is having least ionic character?

(1) FeCl₂

(2) ZnCl₂

(3) MgCl₂

(4) NaCl

 Answer (2)

Question.The shape of I₃ ^– is

(1) Linear

(2) Bent

(3) Pyramidal

(4) See saw

Answer (1)

Question.The number of antibonding electron pairs in O₂^–

(1) 2

(2) 3

(3) 1

(4) 4

Answer (2)

Question. Maximum bond angle at nitrogen is present in which of the following? 

(1) NO₃^-

(2) NO ₂

(3)NO₂^-

(4) 2 NO₂⁺

Answer (4)

Question. Which one of the following molecules contains no  bond? 

(1) H₂O

(2) SO₂

(3) NO₂

(4) CO₂

Answer (1)

Chemical Bonding And Molecular Structure MCQ Questions with Answers Class 11 Chemistry 

Question- All the bond lengths of sulphur – oxygen in sulphate ion, are equal because of:

(a) symmetry

(b) resonance

(c) high electronegativity of oxygen

(d) None of these

Answer-(b)

Question- The evolution of various theories of valence and the interpretation of the nature of chemical bonds have closely been related to the developments in the understanding of

(a) structure of atom

(b) electronic configuration of elements

(c) periodic table

(d) All of the above

Answer-(d)

Question- In the cyanide ion, the formal negative charge is on

(a) C

(b) N

(c) Both C and N

(d) Resonate between C and N

Answer-(b)

Question- In the formation of a molecule which of the following take part in chemical combination?

(a) cation

(b) anion

(c) valence electron

(d) inner shell electron

Answer-(c)

Question- Cation and anion combines in a crystal to form following type of compound

(a) ionic

(b) metallic

(c) covalent

(d) dipole-dipole

Answer-(a)

Question-  The effect of more electronegative atom on the strength of ionic bond

(a) increases

(b) decreases

(c) remains the same

(d) decreases slowly

Answer-(a)

Question-  Electrovalence of calcium and chlorine respectively is

(a) + 2, – 1

(b) + 1, – 1

(c) + 1, – 2

(d) + 2, – 2

Answer-(a)

Question-  Who introduced the term covalent bond ?

(a) Lewis

(b) Langmuir

(c) Nyholm and Gillespie

(d) Heitler and London

Answer-(b)

Question- Which of the following methods is used for measuring bond length ?

(a) X-ray diffraction

(b) Electron-diffraction

(c) Spectroscopic techniques

(d) All of these

Answer-(d)

Question-  What are the exceptions of the octet rule ?

(a) The incomplete octet of central atom

(b) An odd number of electrons on central atom.

(c) Expanded octet of the central atom

(d) All of these

Answer-(d)

Question- In ionic solids how crystal structure get stabilized

(a) By the energy released in the formation of crystal lattice.

(b) By achieving octet of electrons around the ionic species in gaseous state.

(c) By electron gain enthalpy and the ionization enthalpy.

(d) None of these

Answer-(a)

Question- Who provide explanation of valence based on intertness of noble gases ?

(a) Lewis

(b) Kossel-Lewis

(c) Langmuir

(d) Sidgwick & Powell

Answer-(b)

Question-  Energy required to completely separate one mole of a solid ionic compound into gaseous constituent ions is called .......... .

(a) Ionisation enthalpy

(b) Electron gain enthalpy

(c) Bond dissociation enthalpy

(d) Lattice enthalpy

Answer-(d)

Question- Which of the following is/are not the condition(s) for Lewis dot structure?

(i) Each bond is formed as a result of sharing of an electron pair between the atoms.
(ii) From the two combining atoms only one atom contribute electron(s) to the shared pair.
(iii) The combining atoms attain the outer shell noble gas configurations as a result of the sharing of electrons.

(a) (i) and (iii)

(b) (ii) and (iii)

(c) (ii) only

(d) (iii) only

Answer-(c)

Question-  .......... is measured as the radius of an atom’s core which is in contact with the core of an adjacent atom in a bonded situation.

(a) van der Waal’s radius

(b) Bond length

(c) Covalent radius

(d) Ionic radius

Answer-(c)

Question-  The bond formed as a result of the electrostatic attraction between the positive and negative ions is termed as ...

(a) Chemical bond

(b) Electrovalent bond

(c) Co-ordinate bond

(d) Covalent bond

Answer-(b)

Question- Resonance is due to

(a) delocalization of sigma electrons

(b) delocalization of pi electrons

(c) migration of protons

(d) Both (a) and (b)

Answer-(b)

Question- The attractive force which holds various constituents (atoms, ions etc.) together in different chemical species is called a

(a) chemical bond

(b) chemical compound

(c) ionic bond

(d) covalent bond

Answer-(a)

Question- When a metal atom combines with 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

Answer-(d)