Question 1

A molecule of acetonitrile CH3CN contains ________ sigma bonds and ________ pi bonds.

Accepted Answer

A) 5, 2 
B) 4,3 
C) 4,2 
D) 2,2 
E) 4,0 
A) 5, 2 
B) 4,3 
C) 4,2 
D) 2,2 
E) 4,0

Question 2

The N-H bond in the ammonium ion, NH4+, is formed by the overlap of what two orbitals?

Accepted Answer

A) sp3-sp3 
B) sp3-sp2 
C) sp2-sp2 
D) sp2-s 
E) sp3-s 
A) sp3-sp3 
B) sp3-sp2 
C) sp2-sp2 
D) sp2-s 
E) sp3-s

Question 3

The formal charge on nitrogen in the compound below is ________.

Accepted Answer

A) +2 
B) +1 
C) 0 
D) -1 
E) -2 
A) +2 
B) +1 
C) 0 
D) -1 
E) -2

Question 4

The atomic number of boron is 5. The correct electronic configuration of boron is ________.

Accepted Answer

A) 1s2 2s3 
B) 1s2 2p3 
C) 1s2 2s2 2p1 
D) 2s2 2p3 
E) 1s2 2s2 3s1 
A) 1s2 2s3 
B) 1s2 2p3 
C) 1s2 2s2 2p1 
D) 2s2 2p3 
E) 1s2 2s2 3s1

Question 5

Identify the hybridization of the oxygen in CH3OCH3.

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp4 
E) sp5 
A) sp 
B) sp2 
C) sp3 
D) sp4 
E) sp5

Question 6

What is the predicted shape, bond angle, and hybridization for +CH3?

Accepted Answer

A) trigonal planar, 120°, sp2 
B) trigonal planar, 120°, sp3 
C) trigonal planar, 109.5°, sp2 
D) trigonal pyramidal, 120°, sp2 
E) trigonal pyramidal, 109.5°, sp2 
A) trigonal planar, 120°, sp2 
B) trigonal planar, 120°, sp3 
C) trigonal planar, 109.5°, sp2 
D) trigonal pyramidal, 120°, sp2 
E) trigonal pyramidal, 109.5°, sp2

Question 7

Among the hydrogen halides, the strongest bond is found in ________ and the longest bond is found in ________.

Accepted Answer

A) HF, HF 
B) HF, HI 
C) HI, HF 
D) HI, HI 
E) HCl, HBr 
A) HF, HF 
B) HF, HI 
C) HI, HF 
D) HI, HI 
E) HCl, HBr

Question 8

What orbitals overlap to create the C-H bond in ethene (H2C=CH2)?

Accepted Answer

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

Question 9

Which of the following species have tetrahedral bond angles?

Accepted Answer

A) A, D and E 
B) A, D, E and F 
C) A and E 
D) D only 
E) A, B and E 
A) A, D and E 
B) A, D, E and F 
C) A and E 
D) D only 
E) A, B and E

Question 10

Give the electronic configuration for Ca+2.

Accepted Answer

Question 11

Choose the correct hybridization for the atom indicated in the molecule below. CH3CH2CH2CH3
↑

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) none of the above 
A) sp 
B) sp2 
C) sp3 
D) none of the above

Question 12

Determine the number of pi bonds in CH3CN.

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
E) 4 
A) 0 
B) 1 
C) 2 
D) 3 
E) 4

Question 13

Which of the following contain(s)polar covalent bonds?

Accepted Answer

A) NH3 
B) Na2O 
C) H2 
D) KF 
E) both A and C 
A) NH3 
B) Na2O 
C) H2 
D) KF 
E) both A and C

Question 14

In what type of orbital are the lone pair electrons of methoxide (CH3O-)found ?

Accepted Answer

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

Question 15

Draw the structure of a molecule which contains only carbon and hydrogen atoms (only three of which are carbon)and in which two of the carbons are sp2 hybridized and the other is sp hybridized.

Accepted Answer

H₂C @#IMG-DLM&_TB1830

Question 16

Both sigma (σ)and pi (π)bonds can be formed by overlapping p orbitals. Describe the difference.

Accepted Answer

Sigma bonds are formed from the overlap

Question 17

Which of the following elements does this electronic configuration represent? 1s2 2s2 2p5

Accepted Answer

A) F 
B) C 
C) N 
D) Al 
E) O 
A) F 
B) C 
C) N 
D) Al 
E) O

Question 18

What kind of molecular orbital (σ, σ*, π, or π*)results when the two atomic orbitals shown below interact in the manner indicated?

Accepted Answer

The answer of What kind of molecular orbital (σ, σ*,...

Question 19

What kind of molecular orbital (σ, σ*, π, or π*)results when the two atomic orbitals shown below interact in the manner indicated?

Accepted Answer

The answer of What kind of molecular orbital (σ, σ*,...

Question 20

What orbitals are used to form the covalent bonds in butane (CH3CH2CH2CH3)?

Accepted Answer

The carbon-carbon σ bonds are formed by

Exam 1: Remembering General Chemistry: Electronic Structure and Bonding

A molecule of acetonitrile CH3CN contains ________ sigma bonds and ________ pi bonds.

The N-H bond in the ammonium ion, NH4+, is formed by the overlap of what two orbitals?

The formal charge on nitrogen in the compound below is ________.

The atomic number of boron is 5. The correct electronic configuration of boron is ________.

Identify the hybridization of the oxygen in CH3OCH3.

What is the predicted shape, bond angle, and hybridization for +CH3?

Among the hydrogen halides, the strongest bond is found in ________ and the longest bond is found in ________.

What orbitals overlap to create the C-H bond in ethene (H2C=CH2)?

Which of the following species have tetrahedral bond angles?

Give the electronic configuration for Ca+2.

Choose the correct hybridization for the atom indicated in the molecule below. CH3CH2CH2CH3 ↑

Determine the number of pi bonds in CH3CN.

Which of the following contain(s)polar covalent bonds?

In what type of orbital are the lone pair electrons of methoxide (CH3O-)found ?

Draw the structure of a molecule which contains only carbon and hydrogen atoms (only three of which are carbon)and in which two of the carbons are sp2 hybridized and the other is sp hybridized.

Both sigma (σ)and pi (π)bonds can be formed by overlapping p orbitals. Describe the difference.

Which of the following elements does this electronic configuration represent? 1s2 2s2 2p5

What kind of molecular orbital (σ, σ*, π, or π*)results when the two atomic orbitals shown below interact in the manner indicated?

What kind of molecular orbital (σ, σ*, π, or π*)results when the two atomic orbitals shown below interact in the manner indicated?

What orbitals are used to form the covalent bonds in butane (CH3CH2CH2CH3)?

Acids and Bases: Central to Understanding Organic Chemistry

An Introduction to Organic Compounds

Isomers: the Arrangement of Atoms in Space

Alkenes Thermodynamics and Kinetics

Reactions of Alkenes

Reactions of Alkynes Introduction to Multistep Synthesis

Electron Delocalization, Resonance, and Aromaticity More About Molecular Orbital Theory

Substitution Reactions of Alkyl Halides

Elimination Reactions of Alkyl Halides Competition Between Substitution and Elimination

Reactions of Alcohols, Ethers, Epoxides, and Sulfur-Containing Compounds

Organometallic Compounds

Reactions of Alkanes, Radicals

Mass Spectrometry, Infrared Spectroscopy, and Uvvis Spectroscopy

Nmr Spectroscopy

Reactions of Carboxylic Acids and Carboxylic Acid Derivatives

Reactions of Aldehydes and Ketones

Reactions at the Alpha Carbon of Carbonyl Compounds

Reactions of Benzene and Substituted Benzenes

More About Amines Heterocylic Compounds

Carbohydrates

Amino Acids, Peptides, and Proteins

Catalysis

The Organic Mechanisms of the Coenzymes

The Chemistry of Metabolism

Nucleosides, Nucleotides, and Nucleic Acids

Synthetic Polymers

Pericyclic Reactions

Filters

A molecule of acetonitrile CH₃CN contains sigma bonds and pi bonds.

The N-H bond in the ammonium ion, NH₄⁺, is formed by the overlap of what two orbitals?

Identify the hybridization of the oxygen in CH₃OCH₃.

What is the predicted shape, bond angle, and hybridization for ⁺CH₃?

Among the hydrogen halides, the strongest bond is found in and the longest bond is found in .

What orbitals overlap to create the C-H bond in ethene (H₂C=CH₂)?

Give the electronic configuration for Ca⁺².

Choose the correct hybridization for the atom indicated in the molecule below. CH₃CH₂CH₂CH₃ _↑

Determine the number of pi bonds in CH₃CN.

In what type of orbital are the lone pair electrons of methoxide (CH₃O^-)found ?

Draw the structure of a molecule which contains only carbon and hydrogen atoms (only three of which are carbon)and in which two of the carbons are sp² hybridized and the other is sp hybridized.

Which of the following elements does this electronic configuration represent? 1s² 2s² 2p⁵

What kind of molecular orbital (σ, σ, π, or π)results when the two atomic orbitals shown below interact in the manner indicated?

What kind of molecular orbital (σ, σ, π, or π)results when the two atomic orbitals shown below interact in the manner indicated?

What orbitals are used to form the covalent bonds in butane (CH₃CH₂CH₂CH₃)?