Question 1

Which of the following best describes the bonding in a molecule of ethylene ($$C_2H_4$$)?

Accepted Answer

Each carbon forms three sigma bonds using $$sp^2$$ hybrid orbitals and one pi bond from unhybridized $$p$$ orbitals.

Question 2

Given the following skeletal structure (see image 3, structure 3), what is the molecular formula?

Accepted Answer

$$C_2H_6O$$

Question 3

Which of the following statements about resonance is correct?

Accepted Answer

The best resonance contributor has complete octets, more bonds, and minimal charge separation.

Question 4

What is the hybridization of the central atom in ammonia ($$NH_3$$)?

Accepted Answer

$$sp^3$$

Question 5

Which intermolecular force is primarily responsible for the high boiling point of water?

Accepted Answer

Hydrogen bonding

Question 6

Which of the following solvents is most likely to dissolve sodium chloride ($$NaCl) $$based on dielectric constant and intermolecular forces?

Accepted Answer

Water

Question 7

What is the formal charge on the oxygen atom in the following Lewis structure of $$CH_2O ($$formaldehyde)?

Accepted Answer

$$0$$

Question 8

Which of the following molecules is nonpolar?

Accepted Answer

$$CCl_4$$

Question 9

Which of the following best describes the geometry and hybridization of the central atom in $$CH_4$$?

Accepted Answer

Tetrahedral, $$sp^3$$

Question 10

Which of the following line-angle structures (see image 3) represents methylcyclopentane?

Accepted Answer

Structure 4

Question 11

Which of the following statements about polar protic solvents is correct?

Accepted Answer

They can solvate both cations and anions effectively.

Question 12

Given the structure in image 4, what is the IUPAC name of the compound?

Accepted Answer

Cyclohexanecarboxylic acid

Question 13

Which of the following best explains why dichloromethane (methylene chloride) is a better solvent for organic compounds than water?

Accepted Answer

It is moderately polar and can dissolve a wide range of organic molecules.

Question 14

Which of the following is the empirical formula for glucose ($$C_6H_{12}O_6$)?

Accepted Answer

$$CH_2O$$

Question 15

Which of the following molecules (see image 5) contains both aromatic and alkene functional groups?

Accepted Answer

Structure 4

Question 16

Which of the following best describes the effect of intermolecular forces on boiling point?

Accepted Answer

Stronger intermolecular forces result in higher boiling points.

Question 17

Which of the following is a correct statement about the resonance in acetic acid ($$CH_3COOH$$)?

Accepted Answer

The negative charge is best placed on the more electronegative oxygen atom.

Question 18

Which of the following line-angle structures (see image 3) represents toluene?

Accepted Answer

Structure 7

Question 19

Which of the following best describes the geometry of $$CCl_4$$?

Accepted Answer

Tetrahedral

Question 20

Which of the following is the correct hybridization for the carbon atom in acetylene ($$C_2H_2$$)?

Accepted Answer

$$sp$$

Structure and Bonding in Organic Chemistry: Foundations and Applications

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