Question 1

Order the following covalent bonds from most polar to least polar: C–C, C–N, C–O, C–H, C–F.

Accepted Answer

C–F \u003e C–O \u003e C–N \u003e C–H \u003e C–C

Question 2

Which of the following correctly describes the hybridization of the nitrogen atom labeled 'a' in the structure of nicotine (where 'a' is the nitrogen in the pyridine ring)?

Accepted Answer

$$sp^2$$

Question 3

Which of the following best describes the bond formed by the side-to-side overlap of two parallel p orbitals?

Accepted Answer

$$\pi$$ bond

Question 4

Convert the condensed structure $$CH_3CH_2CH($$OCH_3$$)CH_3$ to its skeletal structure. Which of the following is correct?

Accepted Answer

A four-carbon chain with a methoxy group on the third carbon

Question 5

Which of the following series is correctly ordered from most acidic to least acidic?

Accepted Answer

BrCH_2COOH \u003e BrCH_2CH_2COOH \u003e CH_3CH_2COOH

Question 6

Which of the following is the strongest base?

Accepted Answer

$$NH_2$$^-$$

Question 7

Given the acid-base reaction: $$CH_3COOH + NH_3$ \rightarrow CH_3COO^- + NH_4$^+$$, which direction is favored at equilibrium?

Accepted Answer

To the right (products favored)

Question 8

Which of the following correctly describes the resonance contributor for cyclohexanone with a negative charge on the oxygen?

Accepted Answer

A structure with a single bond between the oxygen and carbon, a negative charge on the oxygen, and a double bond between the alpha carbon and the carbonyl carbon

Question 9

Which of the following compounds has the lowest boiling point?

Accepted Answer

tert-Butyl ether ($$C_4H_{10}O)$$

Question 10

Which of the following best explains why 2-fluoropropanoic acid is more acidic than propanoic acid?

Accepted Answer

The electronegative fluorine atom stabilizes the conjugate base via the inductive effect

Question 11

Which of the following is the correct IUPAC name for the compound shown: a cyclohexane ring with an amino group and a methyl group on adjacent carbons?

Accepted Answer

2-Methylcyclohexanamine

Question 12

What is the dihedral angle between the methyl groups in the Newman projection labeled 'B' (staggered, anti conformation)?

Accepted Answer

$$180^\circ$$

Question 13

Which conformer of 1,2-dimethylcyclohexane is more stable: cis or trans, and why?

Accepted Answer

Trans, because both methyl groups can be equatorial

Question 14

Which of the following best describes the hybridization of the carbon atom in formaldehyde ($$CH_2O$$)?

Accepted Answer

$$sp^2$$

Question 15

Which of the following is the correct resonance structure for the enolate ion formed from acetone?

Accepted Answer

A structure with a negative charge on the oxygen and a double bond between the alpha carbon and the carbonyl carbon

Question 16

Which of the following best describes the bond formed by the end-to-end overlap of two $$sp^3$$ hybrid orbitals?

Accepted Answer

$$\sigma$$ bond

Question 17

Which of the following correctly orders the acids HI, HCl, and HF from most acidic to least acidic?

Accepted Answer

HI \u003e HCl \u003e HF

Question 18

Which of the following is the correct skeletal structure for 4-isopropylcyclohexanol?

Accepted Answer

A cyclohexane ring with an isopropyl group at carbon 4 and a hydroxyl group at carbon 1

Question 19

Which of the following best describes the hybridization of the carbon atom indicated by an arrow in the structure of Streptomycin A (assuming the arrow points to a carbon in a double bond)?

Accepted Answer

$$sp^2$$

Organic Chemistry Fundamentals: Bonding, Structure, Acidity, and Conformations

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