NEET Chemistry Chemical Bonding and Molecular Structure MCQs Set B

Question:  The molecular orbital shown below can be described respectively as

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: The hybrid orbital having only 20% d character

• a) CCl₄ 
• b) SF₆
• c) SF₄
• d) Cl₂O

Answer:  SF₄

Question: Which of the following molecule stabilizes by removal of electron?

• a) C₂
• b) O₂
• c) N₂
• d) H₂

Answer:  O₂

Question: Which of the following statement is correct?

• a) The hybridisation of Cl in ClF³   is sp²
• b) The number of lone pairs and bond pairs in I₃^– are 2 and 2 respectively
• c) The shape of XeF₆  is distorted square bipyramidal
• d) Hybridisation of S is sp³ in SO₂

Answer: The shape of XeF₆  is distorted square bipyramidal

Question:  The formal charges of oxygen labelled 3,2,1 in ozone respectively are

• a) –1, +1, 0
• b) 0, 0, –1
• c) –1, 0, +1
• d) 0, +1, –1

Answer: –1, 0, +1

Question:  Number of nodal planes in π^*2p_x are

• a) Zero
• b) One
• c) Two
• d) Three

Answer: Two

Question: Which of the following is not a correct statement?

• a) Multiple bonds are always shorter than corresponding single bonds
• b) The electron-deficient molecules can act as Lewis acids
• c) The canonical structures have no real existence
• d) Every AB₅ molecules does in fact have square pyramid structure

Answer:  Every AB₅ molecules does in fact have square pyramid structure

Question:  Some of the properties of the two species, NO₃^- and H₃O⁺ are described below. Which one of them is correct?

• a) Dissimilar hybridization for the central atom with different structures
• b) Isostructural with same hybridization for the central atom
• c) Isostructural with different hybridization for the central atom
• d) Similar hybridization for the central atom with different structures

Answer: Dissimilar hybridization for the central atom with different structures

Question:  The ground state electronic configuration of valence shell electrons in nitrogen molecule (N₂) is written as kk,

Hence the bond order in nitrogen molecule is

• a) 2
• b) 3
• c) 0
• d) 1

Answer: 3

Question: A certain diatomic molecule, AB has dipole moment 1.6 D and the internuclear distance is 100 pm. The percentage of electronic charge existing on more electronegative atom is

• a) 33%
• b) 25%
• c) 50%
• d) 10%

Answer: 33%

Question:  Which of the following is correct for XeO₂F₂  and PCl₅ ?

• a) Both have same hybridisation and shape
• b) Both have same hybridisation but different geometry
• c) Both have different hybridisation but same shape
• d) Both have same hybridisation but different shape

Answer: Both have same hybridisation but different shape

Question:  The maximum number of 180° angle possible between X-M-X bond for compounds with sp³d² and sp³d  hybridisation respectively are

• a) 3, 3
• b) 3, 1
• c) 1, 3
• d) 3, 0

Answer: 3, 1

Question:  The shape for the molecule with general formula AF₆ with one lone pair can be represented as

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:   Which of the following is correct representation of dipole moment of NH₃ molecule?

• a)

  

• b)

  

• c)

  

• d)  NH₃ being symmetrical will not show dipole moment

Answer:

Question: Incorrect statement regarding hybridization is

• a) It is not possible for isolated atoms
• b) Number of hybrid orbital formed is same as the number of orbitals combining
• c) Only the half filled orbitals and fully filled orbitals can participate not the empty orbital
• d) It is not a real physical process

Answer: Only the half filled orbitals and fully filled orbitals can participate not the empty orbital

Question:  Dipole moment of  is

1.1 D hence dipole moment of given compound will be

• a) 1.1 D
• b) 4.4 D
• c) 3.3 D
• d) 2.56 D

Answer: 1.1 D

Question:   In

hybrid state of N atom is

• a) sp² 
• b) sp³
• c) sp³d²
• d) sp

Answer:  sp³

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

• a) NH₄⁺
• b) HCl
• c) CH₄ 
• d) H₂O₂

Answer:  H₂O₂

Question:  The shape of I₃^– is

• a) Linear
• b) Bent
• c) Pyramidal
• d) See saw

Answer: Linear

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

• a) I, II, III
• b) II, III, IV
• c) I, II, IV
• d) II, IV

Answer: I, II, IV

Question:  Arrange the following species in increasing order of bond angle NF₃, NCl₃, NBr₃,NI₃

• a) NF₃< NCl₃< NBr₃< NI₃ 
• b) NF₃< NBr₃< NI₃< NCI₃ 
• c) NI₃< NBr₃< NCl₃< NF₃
• d) NBr₃< NI₃< NF₃< NCl₃

Answer: NF₃< NCl₃< NBr₃< NI₃ 

Question:  o-nitrophenol is

• a) More volatile than p-nitrophenol
• b) Less volatile than p-nitrophenol
• c) Equally volatile as p-nitrophenol
• d) Non-volatile

Answer: More volatile than p-nitrophenol

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

• a) 4
• b) 2
• c) 3
• d) May be 1 or 2

Answer: 4

Question:  Which of the following pair consists of only paramagnetic species?

• a) H₂, O₂⁺
• b) N₂, O₂ 
• c) CO, N₂  
• d) H₂⁺, O₂^–

Answer: H₂⁺, O₂^–

Question: Number of angles of 109°28' is present in CCl₄

• a) 2
• b) 4
• c) 6
• d) 8

Answer: 6

Question:  Number of carbon atoms present in sp² hybrid state of given molecule?

• a) 9
• b) 8
• c) 3
• d) 2

Answer: 8

Question: According to octet rule the compound which contain ionic, covalent and coordinate bonds

• a) CaSO₄
• b) NH₄Cl 
• c) NaNO₃
• d) All of these

Answer: All of these

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

• a) FeCl₂ 
• b) ZnCl₂ 
• c) MgCl₂
• d) NaCl

Answer:  ZnCl₂ 

Question: In the given structure of a compound, the correct various bond moments direction involving atoms are shown as

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

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

• a) 2
• b) 3
• c) 1
• d) 4

Answer: 3

Question:  In PO₄^3– ion, the effective charge on each oxygen atom and P–O bond order respectively are

• a) –0.75, 1.25
• b) –0.75, 1.0
• c) –0.75, 0.6
• d) –3, 1.25

Answer: –0.75, 1.25

Question: Which of the following is a polar molecule?

• a) Para dichlorobenzene
• b) Carbon tetrachloride
• c) Tetrachloroethene
• d)

  

Answer:

Question:   In a regular trigonal bipyramidal MX₅  , the number of X – M – X bonds at 180º is

• a) One
• b) Two
• c) Six
• d) Four

Answer: One

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

• a) NO₃^-
• b) NO₂  
• c) NO₂^-
• d) NO₂⁺

Answer:  NO₂⁺

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

• a) CO₂
• b) CH₄
• c) NH₃
• d) NF₃

Answer:  NH₃

Question: Which one of the following species has plane triangular shape?

• a) N₃  
• b) NO₃^– 
• c) NO₂^– 
• d) CO₂

Answer: NO₂^– 

Question: Which one of the following molecules contains no π bond? 

• a) H₂O 
• b) SO₂ 
• c) NO₂
• d) CO₂

Answer: H₂O 

Question: Which of the following is a polar molecule?

• a) SF₄ 
• b) SiF₄
• c) XeF₄  
• d) BF₃

Answer:  SF₄ 

Question: Which of the following is paramagnetic?

• a) O₂^– 
• b) CN^–
• c) NO⁺ 
• d) CO

Answer:  O₂^– 

Question: The pair of species with the same bond order is

• a) NO, CO
• b) N₂, O₂
• c) O₂²–, B₂
• d) O₂⁺, NO⁺

Answer: O₂²–, B₂

Question: Bond order of 1.5 is shown by

• a) O₂^2- 
• b) O₂
• c) O₂⁺ 
• d) O₂^-

Answer:  O₂^-

Question: Which one of the following pairs is isostructural (i.e. having the same shape and hybridization)?

• a) [NF₃ and BF₃] 
• b) [BF₄^-  and NH₄⁺] 
• c) [BCl₃ and BrCl₃] 
• d) [NH₃ and NO₃^- ]

Answer:  [BF₄^-  and NH₄⁺] 

Question:  During change of O₂  to O₂^2– ion, the electron adds on which one of the following orbitals?

• a) π* orbitals
• b) π orbitals 
• c) σ* orbitals 
• d) σ orbitals

Answer: π* orbitals

Question: Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the following has the minimum bond length?

• a) O₂
• b) O₂⁺ 
• c) O₂– 
• d) O₂²–

Answer:  O₂⁺ 

Question: The correct order of increasing bond length of C – H, C – O, C – C and C = C is 

• a) C – H < C – O < C – C < C = C 
• b) C – H < C = C < C – O < C – C
• c) C – C < C = C < C – O < C – H
• d) C – O < C – H < C – C < C = C

Answer:  C – H < C = C < C – O < C – C

Question:  Which of the two ions from the list given below that have the geometry that is explained by the same hybridization of orbitals

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:  Which of the following structures is the most preferred and hence of lowest energy for SO₃?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which one of the following species does not exist under normal conditions?

• a) Be₂⁺
• b) Be₂ 
• c) B₂ 
• d) Li₂

Answer:  Be₂ 

Question: The angular shape of molecule (O₃) consists of

• a) 2 sigma and 1 pi bond
• b) 1 sigma and 2 pi bonds
• c) 2 sigma and 2 pi bonds
• d) 1 sigma and 1 pi bond

Answer: 2 sigma and 1 pi bond

Question: Which of the following is not a correct statement?

• a) The electron-deficient molecules can act as Lewis acids
• b) The canonical structures have no real existence
• c) Every AB₅ molecule does in fact have square pyramid structure
• d) Multiple bonds are always shorter than corresponding single bonds

Answer:  Every AB₅ molecule does in fact have square pyramid structure

Question: The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is

• a) 2
• b) 3
• c) 4
• d) 1

Answer: 2

Question: Which of the following molecules has trigonal planar geometry?

• a) IF₃
• b) PCl₃
• c) NH₃
• d) BF₃

Answer:  BF₃

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

• a) BF₃
• b) SiF₄
• c) SF₄
• d) XeF₄

Answer: SF₄

Question: Which one of the following oxides is expected to exhibit paramagnetic behaviour?

• a) CO₂
• b) SO₂
• c) CIO₂
• d) SiO₂

Answer:  CIO₂

Question:  The geometry of electron pairs around I in IF₅  is

• a) Octahedral
• b) Trigonal bipyramidal
• c) Square pyramidal
• d) Pentagonal planar

Answer: Octahedral

Question:  The structure and hybridization of Si(CH₃)₄  is

• a) Octahedral, sp³d
• b) Tetrahedral, sp³
• c) Bent, sp
• d) Trigonal, sp²

Answer:  Tetrahedral, sp³

Question:  The number of bonding electron pairs in N₂ on the basis of molecular orbital theory is

• a) 3
• b) 2
• c) 5
• d) 4

Answer: 5

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

• a) Ionic
• b) Metallic
• c) Covalent
• d) Dipole-dipole

Answer: Ionic