Question 1

Which of the following functional groups is present in both acetone (a common nail polish remover) and ibuprofen (the active ingredient in Advil)?

Accepted Answer

Ketone

Question 2

Which functional group is responsible for the acidic properties of carboxylic acids?

Accepted Answer

The $$-COOH$$ group

Question 3

A compound contains the following structure: $$R-$$COOCH_3$$. Which functional group does this represent?

Accepted Answer

Ester

Question 4

Which of the following statements best explains why phenol is more acidic than cyclohexanol?

Accepted Answer

The phenoxide ion is resonance stabilized.

Question 5

Which functional group is present in the structure of an amide?

Accepted Answer

A carbonyl group ($$C=O) $$bonded to a nitrogen atom

Question 6

Which of the following compounds would have the highest boiling point, assuming similar molecular weights?

Accepted Answer

An alcohol

Question 7

Which of the following best describes the relationship between molecular geometry and dipole moment?

Accepted Answer

Tetrahedral molecules with identical substituents have zero dipole moment.

Question 8

Which of the following is the correct order of acid strength (from weakest to strongest) for the following compounds: methane ($$CH_4$$), ammonia ($$NH_3$$), water ($$H_2O$$), and hydrofluoric acid ($$HF$$)?

Accepted Answer

$$CH_4$$ \u003c $$NH_3$$ \u003c H_2O \u003c HF$$

Question 9

Which of the following functional groups is present in both proteins and peptides, and is essential for their structure?

Accepted Answer

Amide

Question 10

A molecule contains both an amine and a carboxylic acid group. What is the name of this type of molecule, and what is its significance in biology?

Accepted Answer

Amino acid; it is the building block of proteins

Question 11

Which of the following best explains why branching in alkanes lowers their boiling point compared to straight-chain isomers?

Accepted Answer

Branching decreases the area of contact between molecules, reducing London dispersion forces.

Question 12

Which of the following functional groups is most likely to participate in hydrogen bonding as a hydrogen bond donor?

Accepted Answer

Alcohol

Question 13

Which of the following is a correct statement about resonance structures?

Accepted Answer

Resonance structures have the same number of valence electrons and atom connectivity.

Question 14

Which of the following functional groups is present in the pain reliever acetaminophen (Tylenol)?

Accepted Answer

Phenol

Question 15

Which of the following best describes the effect of resonance on the acidity of carboxylic acids?

Accepted Answer

Resonance stabilizes the conjugate base, making the acid stronger.

Question 16

Which of the following functional groups is found in the structure of an alkyl halide?

Accepted Answer

A carbon atom bonded to a halogen atom

Question 17

Which of the following is the correct formula for the Henderson-Hasselbalch equation?

Accepted Answer

$$pH = pK_a + \log \frac{[A^-]}{[HA]}$$

Question 18

Which of the following functional groups is present in both esters and acid anhydrides?

Accepted Answer

A carbonyl group ($$C=O) $$adjacent to an oxygen atom

Question 19

Which of the following best describes the difference between a ketone and an aldehyde?

Accepted Answer

A ketone has a $$C=O$$ group bonded to two carbon atoms, while an aldehyde has a $$C=O$$ group bonded to at least one hydrogen atom.

Question 20

Which of the following functional groups is most likely to act as a nucleophile in an organic reaction?

Accepted Answer

Amine

Ch 2

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