Question 1

A sp2 hybridized central boron atom with no lone pairs of electrons has what type of bonding?

Accepted Answer

A) 1 $\pi$ and 2 $\sigma$ bonds 
B) 1 $\pi$ and 3 $\sigma$ bonds 
C) 2 $\pi$ and 2 $\sigma$ bonds 
D) 0 $\pi$ and 4 $\sigma$ bonds 
E) 0 $\pi$ and 3 $\sigma$ bonds 
A) 1 $\pi$ and 2 $\sigma$ bonds 
B) 1 $\pi$ and 3 $\sigma$ bonds 
C) 2 $\pi$ and 2 $\sigma$ bonds 
D) 0 $\pi$ and 4 $\sigma$ bonds 
E) 0 $\pi$ and 3 $\sigma$ bonds

Question 2

Give the number of lone pairs around the central atom and the geometry of the ion IBr2-.

Accepted Answer

A) 0 lone pairs, linear 
B) 1 lone pair, bent 
C) 2 lone pairs, bent 
D) 3 lone pairs, bent 
E) 3 lone pairs, linear 
A) 0 lone pairs, linear 
B) 1 lone pair, bent 
C) 2 lone pairs, bent 
D) 3 lone pairs, bent 
E) 3 lone pairs, linear

Question 3

In which one of the following molecules is the central atom sp2 hybridized?

Accepted Answer

A) SO2 
B) N2O 
C) BeCl2 
D) NF3 
E) PF5 
A) SO2 
B) N2O 
C) BeCl2 
D) NF3 
E) PF5

Question 4

Which of the following correctly lists species in order of increasing bond length?

Accepted Answer

A) C2- 2 2+ 
B) C2 2+ 2- 
C) C2- 2+ 2 
D) C2+ 2 2- 
E) C2+ 2- 2 
A) C2- 2 2+ 
B) C2 2+ 2- 
C) C2- 2+ 2 
D) C2+ 2 2- 
E) C2+ 2- 2

Question 5

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever.What is the hybridization state of oxygen indicated by the arrow in the structure of ibuprofen shown below?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2 
A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2

Question 6

Indicate the type of hybrid orbitals used by the central atom in BrF3.

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2 
A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2

Question 7

Predict the geometry around the central atom in SO42-.

Accepted Answer

A) trigonal planar 
B) trigonal pyramidal 
C) tetrahedral 
D) trigonal bipyramidal 
E) octahedral 
A) trigonal planar 
B) trigonal pyramidal 
C) tetrahedral 
D) trigonal bipyramidal 
E) octahedral

Question 8

According to Valence Bond Theory, which orbital is left vacant in the molecule BH3?

Accepted Answer

A) sp3 
B) sp2 
C) sp 
D) p 
E) s 
A) sp3 
B) sp2 
C) sp 
D) p 
E) s

Question 9

Which one of the following molecules is polar?

Accepted Answer

A) PBr5 
B) CCl4 
C) BrF5 
D) XeF2 
E) XeF4 
A) PBr5 
B) CCl4 
C) BrF5 
D) XeF2 
E) XeF4

Question 10

According to VSEPR theory, which one of the following species has a tetrahedral geometry?

Accepted Answer

A) IF4+ 
B) IF4- 
C) PCl4+ 
D) PCl4- 
E) SeF4 
A) IF4+ 
B) IF4- 
C) PCl4+ 
D) PCl4- 
E) SeF4

Question 11

A species with a bond order of 1/2 may be stable.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following substances is/are bent? (i)H2S (ii).CO2 (iii)ClNO (iv)NH2- (v)O3

Accepted Answer

A) only (iii) 
B) (i)and (v) 
C) (i), (iii), and (v) 
D) (i), (ii), (iii), and (v) 
E) (i), (iii), (iv), and (v) 
A) only (iii) 
B) (i)and (v) 
C) (i), (iii), and (v) 
D) (i), (ii), (iii), and (v) 
E) (i), (iii), (iv), and (v)

Question 13

A molecule with 3 single bonds and 1 lone pair of electrons around the central atom is predicted to have what type of molecular geometry?

Accepted Answer

A) Tetrahedral 
B) Trigonal pyramidal 
C) Bent 
D) Trigonal bipyramidal 
E) Linear 
A) Tetrahedral 
B) Trigonal pyramidal 
C) Bent 
D) Trigonal bipyramidal 
E) Linear

Question 14

Give the number of lone pairs around the central atom and the molecular geometry of CBr4.

Accepted Answer

A) 0 lone pairs, square planar 
B) 0 lone pairs, tetahedral 
C) 1 lone pair, square pyramidal 
D) 1 lone pair, trigonal bipyramidal 
E) 2 lone pairs, square planar 
A) 0 lone pairs, square planar 
B) 0 lone pairs, tetahedral 
C) 1 lone pair, square pyramidal 
D) 1 lone pair, trigonal bipyramidal 
E) 2 lone pairs, square planar

Question 15

The F - S - F bond angles in SF6 are

Accepted Answer

A) 90° and 180° 
B) 109.5° 
C) 120° 
D) 180° 
E) 90° and 120° 
A) 90° and 180° 
B) 109.5° 
C) 120° 
D) 180° 
E) 90° and 120°

Question 16

The bond angles in SF5+ are expected to be

Accepted Answer

A) 90°. 
B) 120°. 
C) 90° and 120°. 
D) 90° and 180°. 
E) 90°, 120°, and 180°. 
A) 90°. 
B) 120°. 
C) 90° and 120°. 
D) 90° and 180°. 
E) 90°, 120°, and 180°.

Question 17

What is the hybridization of the As atom in the AsF5 molecule?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2 
A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2

Question 18

The number of pi bonds in the molecule below is

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 5 
E) 9 
A) 1 
B) 2 
C) 3 
D) 5 
E) 9

Question 19

The hybridization of B in the BF3 molecule is sp3.

Accepted Answer

A) True 
 B)False

Question 20

The geometry of the hybrid orbitals about a central atom with sp2 hybridization is:

Accepted Answer

A) linear 
B) trigonal planar 
C) tetrahedral 
D) bent 
E) trigonal bipyramidal 
A) linear 
B) trigonal planar 
C) tetrahedral 
D) bent 
E) trigonal bipyramidal

Exam 10: Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

A sp2 hybridized central boron atom with no lone pairs of electrons has what type of bonding?

Give the number of lone pairs around the central atom and the geometry of the ion IBr2-.

In which one of the following molecules is the central atom sp2 hybridized?

Which of the following correctly lists species in order of increasing bond length?

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever.What is the hybridization state of oxygen indicated by the arrow in the structure of ibuprofen shown below?

Indicate the type of hybrid orbitals used by the central atom in BrF3.

Predict the geometry around the central atom in SO42-.

According to Valence Bond Theory, which orbital is left vacant in the molecule BH3?

Which one of the following molecules is polar?

According to VSEPR theory, which one of the following species has a tetrahedral geometry?

A species with a bond order of 1/2 may be stable.

Which of the following substances is/are bent? (i)H2S (ii).CO2 (iii)ClNO (iv)NH2- (v)O3

A molecule with 3 single bonds and 1 lone pair of electrons around the central atom is predicted to have what type of molecular geometry?

Give the number of lone pairs around the central atom and the molecular geometry of CBr4.

The F - S - F bond angles in SF6 are

The bond angles in SF5+ are expected to be

What is the hybridization of the As atom in the AsF5 molecule?

The number of pi bonds in the molecule below is

The hybridization of B in the BF3 molecule is sp3.

The geometry of the hybrid orbitals about a central atom with sp2 hybridization is:

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

A sp² hybridized central boron atom with no lone pairs of electrons has what type of bonding?

Give the number of lone pairs around the central atom and the geometry of the ion IBr₂^-.

In which one of the following molecules is the central atom sp² hybridized?

Indicate the type of hybrid orbitals used by the central atom in BrF₃.

Predict the geometry around the central atom in SO₄^2-.

According to Valence Bond Theory, which orbital is left vacant in the molecule BH₃?

Which of the following substances is/are bent? (i)H₂S (ii).CO₂ (iii)ClNO (iv)NH₂^- (v)O₃

Give the number of lone pairs around the central atom and the molecular geometry of CBr₄.

The F - S - F bond angles in SF₆ are

The bond angles in SF₅⁺ are expected to be

What is the hybridization of the As atom in the AsF₅ molecule?

The hybridization of B in the BF₃ molecule is sp³.

The geometry of the hybrid orbitals about a central atom with sp² hybridization is: