Class 11 Chemical Bonding and Molecular Structure MCQs

Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQs

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Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQs (SET A)

1. If the bond has zero percent ionic character, the bond is:
(A) Pure covalent
(B) Partial covalent
(C) Partial ionic
(D) Coordinate covalent
Answer: Pure covalent.

2. The shape of ClO^4− ion is:
(A) Square planar
(B) Square pyramidal
(C) Tetrahedral
(D) Trigonal bipyramidal
Answer: Tetrahedral.

3. Which one is correct?
(A) Dinitrogen is paramagnetic
(B) Dihydrogen is paramagnetic
(C) Dioxygen is paramagnetic
(D) Dioxygen is diamagnetic
Answer: Dioxygen is paramagnetic.

4. If a molecule 𝑀𝑋3 has zero dipole moment the sigma bonding orbitals used by 𝑀(at. no. < 21) is:
(A) Pure 𝑝
(B) 𝑠𝑝-hybrid
(C) 𝑠𝑝2-hybrid
(D) 𝑠𝑝3-hybrid
Answer: 𝑠𝑝2-hybrid.

5. OF2 is:
(A) Linear molecule and 𝑠𝑝-hybridized
(B) Tetrahedral molecule and 𝑠𝑝3-hybridized
(C) Bent molecule and 𝑠𝑝3-hybridized
(D) None of the above
Answer: Bent molecule and 𝑠𝑝3-hybridize.

6. Bond order of 1.5 is shown by:
(A) O2^2−
(B) O2
(C) O2+
(D) O2−
Answer: O2-.

Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQs (SET B)

1. Concept of bond order in the molecular orbital theory depends on the number of electrons in the bonding and antibonding orbitals. The bond order:
(A) Can have a −ve value
(B) Has always an integral value
(C) Is a non-zero quantity
(D) Can assume any +ve value
Answer: Can assume any +ve value.

2. The pair having similar geometry is:
(A) BF3,NH3
(B) BF3,AlF3
(C) BeF2,H2O
(D) BCl3, PCl3
Answer: BF3,AlF3.

3. The structure of ICl^2− is:
(A) Trigonal
(B) Octahedral
(C) Square planar
(D) Distorted trigonal bipyramid
Answer: Distorted trigonal bipyramid.

4. Find which one of the following has not triangular pyramidal shape?
(A) NH3
(B) NCl3
(C) PF3
(D) BCl3
Answer: BCl3.

5. Which atomic orbital is always involved in sigma bonding only?
(A) 𝑠
(B) 𝑝
(C) 𝑑
(D) 𝑓
Answer: s.

6. A 𝜋-bond is formed by sideways overlapping of:
(A) 𝑠-𝑠 orbitals
(B) 𝑝-𝑝 orbitals
(C) 𝑠-𝑝 orbitals
(D) 𝑠-𝑝-𝑠 orbitas
Answer: 𝑝-𝑝 orbitals.

Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQs (SET C)

1. Which of the following are not correct?
(A) Lone pair of electrons
(B) Dipole moment is vector quantity
(C) CO2 molecule has dipole moment
(D) None
Answer: CO2 molecule has dipole moment.

2. Carbon atoms in C2(CN)4 are:
(A) 𝑠𝑝-hybridized
(B) 𝑠𝑝2-hybridized
(C) 𝑠𝑝-and 𝑠𝑝2- hybridized
(D) 𝑠𝑝, 𝑠𝑝2 and 𝑠𝑝3-hybridized
Answer: 𝑠𝑝-and 𝑠𝑝2- hybridized.

3. The example of the 𝑝-𝑝-orbital overlapping is the formation of:
(A) H2 molecule
(B) Cl2 molecule
(C) Hydrogen chloride
(D) Hydrogen bromide molecule
Answer: Cl2 molecule.

4. In the formation of N2+ from N2, the electron is lost from:
(A) a σ-orbital
(B) a π-orbital
(C) a σ∗-orbital
(D) a π∗-orbital
Answer: a σ-orbital.

5. Which of the following two are isostructural?
(A) XeF2,IF2−
(B) NH3, BF3
(C) CO3^2−, SO3^2−
(D) PCl5, ICl5
Answer: XeF2,IF2−.

6. Which has 𝑠𝑝2-hybridization?
(A) CO2
(B) SO2
(C) N2O
(D) CO
Answer: SO2.

Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQs (SET D)

1. In benzene ,Acetic acid exists as dimer due to:
(A) Condensation reaction
(B) Hydrogen bonding
(C) Presence of carboxyl group
(D) None of these
Answer: Hydrogen bonding.

2. Which has zero dipole moment?
(A) ClF
(B) PCl3
(C) SiF4
(D) CFCl3
Answer: SiF4.

3. Two lone pairs of electrons and two bond pairs are present in:
(A) NH3
(B) BF3
(C) CO3^2−
(D) NH2−
Answer: NH2-.

4. The type of hybridization of sulphuratom in SO2 and SO3 .
(A) 𝑠𝑝, 𝑠𝑝2
(B) 𝑠𝑝2, 𝑠𝑝2
(C) 𝑠𝑝2, 𝑠𝑝3
(D) 𝑠𝑝, 𝑠𝑝3
Answer: 𝑠𝑝2, 𝑠𝑝2.

5. Dipole moment is exhibited by:
(A) 1, 4-dichlorobenzene
(B) 1, 2-dichlorobenzene
(C) 𝑇𝑟𝑎𝑛𝑠-1, 2-dichloroethene
(D) None of these
Answer: 1, 2-dichlorobenzene.

6. In which molecule all atoms are coplanar?
(A) CH4
(B) BF3
(C) PF3
(D) NH30
Answer: BF3.

Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQs (SET E)

1. Find the species has a linear shape?
(A) NO2+
(B) O3
(C) NO2−
(D) SO2
Answer: NO2+.

2. In which of the following molecules/ions are all the bonds not equal?
(A) SF4
(B) SiF4
(C) XeF4
(D) BF4−
Answer: SF4.

3. According to MO theory, which of the following lists ranks the nitrogen species in terms of increasing bond order?
(A) N2− < N2 2− < N2
(B) N2− < N2 < N2 2−
(C) N2^2− < N2− < N2
(D) N2 < N2^2− < N2−
Answer: N2^2− < N2− < N2.

4. Hybridization state of I in ICl^2+ is:
(A) 𝑑𝑠𝑝2
(B) 𝑠𝑝
(C) 𝑠𝑝2
(D) 𝑠𝑝3
Answer: sp3.

5. Dipole-dipole attractive forces are strongest between the molecules of:
(A) He
(B) CH4
(C) CO2
(D) H2O
Answer: H2O.

6. The pair of elements which on combination are most likely to form an ionic compound is:
(A) Na and Ca
(B) K and O2
(C) O2 and Cl2
(D) Al and I2
Answer: K and O2.

Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQs (SET F)

1. A molecule which cannot exist theoretically is:
(A) SF4
(B) OF2
(C) OF4
(D) O2F2
Answer: OF4.

2. Which has an odd electron and shows paramagnetic character?
(A) NO
(B) SO2
(C) CO2
(D) H2O
Answer: NO.

4. Which species has lone pair on central atom?
(A) CCl4
(B) CH4
(C) NH4+
(D) H2O
Answer: H2O.

5. The dipole moment of CHCl3 is 1.05 debye while that of CCl4 is zero, because CCl4 is:
(A) Linear
(B) Symmetrical
(C) Planar
(D) Regular tetrahedral
Answer: Regular tetrahedral.

6. Which of the following species is tetrahedral?
(A) SF4
(B) ICl4–
(C) XeF4
(D) CH4
Answer: CH4.

Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQs (SET G)

1. The Total number of right angles in trigonal bipyramidal geometry is/are ?
(A) 3
(B) 12
(C) 6
(D) 9
Answer: 6.

2. Correct order of lattice energy is
(A) NaF < NaCl
(B) Na2O < MgO
(C) Al2O3 < MgO
(D) All of these
Answer: Al2O3 < MgO.

3. Which of the following possess the least covalent character?
(A) LiCl
(B) NaCl
(C) KCl
(D) CsCl
Answer: CsCl.

4. Which of the following has the zero bond order (non existing species) ?
(A) O2
(B) Li2
(C) N2
(D) Be2
Answer: Be2.

5. Incorrect for NH4+
(A) Four N–H bonds are present
(B) Tetrahedral in shape
(C) Two type of N–H bond lengths are present
(D) Bond angle is 109.5º
Answer: Two type of N–H bond lengths are present

6. How many lone pairs are present on central atom in PCl5.
(A) One
(B) Two
(C) Three
(D) Zero
Answer: zero.

Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQs (SET H)

1. Correct for NO2 is:
(A) Linear shape
(B) Diamagnetic
(C) sp2 hybridised nitrogen
(D) Bond angle is 117.5
Answer: sp2 hybridised nitrogen.

2. Pair of species which does not exist
(A) NCl5, PCl5
(B) OF6, ClF3
(C) XeH4, XeF2
(D) PBr6–, SiCl62–
Answer: PBr6–, SiCl62–.

3. Average Bond order of C – O bond in CO32– will be
(A) –2/3
(B) +2/3
(C) –4/3
(D) 4/3
Answer: 4/3.

4. The compound which contains both ionic and covalent bonds is:
(A) NaCl
(B) HCl
(C) NH4Cl
(D) KCl
Answer: NH4Cl.

5. In which of the given change, bond angle at central atom is not changed ?
(A) AlCl3 —> AlCl4–
(B) BF3 —> BF4–
(C) NH3 —> NH4+
(D) CH4 —> CF4
Answer: CH4 —> CF4.

6. Bad conductor of electricity is solid NaCI because :
(A) There is no mobility in solid NaCl ions
(B) None
(C) directional bonds and low-boiling Points
(D) high solubilities in polar and non-polar solvents
Answer: high solubilities in polar and non-polar solvents.

Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure MCQs (SET I)

1. Strongest π bond is formed by:
(A) 3pπ – 3pπ
(B) 2pπ – 2pπ
(C) 3dπ – 3dπ
(D) 3dπ – 3pπ
Answer: 2pπ – 2pπ.

2. Which of the following contains both covalent and ionic bond?
(A) NH4Cl
(B) H2O
(C) CCl4
(D) CaCl2
Answer: NH4Cl.

3. The group having triangular planar structures is:
(A) BF3, NF3, CO32–
(B) CO3^2–, NO3–, SO3
(C) O2, N2
(D) none
Answer: CO3^2–, NO3–, SO3.

4. The compound MX4 is tetrahedral. The number of LXMX formed in the compound are
(A) three
(B) four
(C) five
(D) six
Answer: six.

5. In piperidine , the hybrid state assumed by N is
(A) sp
(B) sp2
(C) sp3
(D) none
Answer: sp3.

6. Amongst LiCl, RbCl, BeCl2 and MgCl2 the compounds with the greatest and the least ionic character, respectively are:
(A) LiCl and RbCl
(B) RbCl and BeCl2
(C) MgCl2 and BeCl2
(D) RbCl and MgCl2
Answer: RbCl and BeCl2.

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