Question 1

Which of the following best describes a Bronsted-Lowry acid?

Accepted Answer

A species that donates a proton.

Question 2

What is the relationship between acid strength and the acid dissociation constant $$K_a$$?

Accepted Answer

The stronger the acid, the larger the $$K_a.$$

Question 3

Which of the following is the correct formula for calculating $$pK_a$$?

Accepted Answer

$$pK_a = -\log$$_{10}$$K_a$$

Question 4

Which statement correctly predicts the direction of an acid/base equilibrium?

Accepted Answer

Equilibrium favors formation of the weaker acid and weaker base.

Question 5

Which factor does NOT contribute to the stability of a conjugate base?

Accepted Answer

Molecular weight

Question 6

Which of the following functional groups contains a carbonyl group ($$C=O) $$attached to a hydroxyl group ($$-OH$$)?

Accepted Answer

Carboxylic acid

Question 7

Which intermolecular force is present in all organic molecules, including hydrocarbons?

Accepted Answer

London dispersion force (induced dipole/induced dipole)

Question 8

Why do carboxylic acids generally have higher boiling points than esters of similar molecular weight?

Accepted Answer

Carboxylic acids can form two hydrogen bonds per molecule.

Question 9

Which of the following compounds is classified as an unsaturated hydrocarbon?

Accepted Answer

$$C_2H_4$$

Question 10

Which of the following is a correct statement about the relationship between $$pK_a$$ and acid strength?

Accepted Answer

Strong acids have small $$pK_a$$ values.

Question 11

Which of the following functional groups is present in the compound $$CH_3CH_2OH$$?

Accepted Answer

Alcohol

Question 12

Which of the following molecules can participate in hydrogen bonding?

Accepted Answer

Ethanol ($$CH_3CH_2OH)$$

Question 13

Which of the following is the correct order of increasing acidity for the following groups: $$CH_4$$, $$NH_3$$, $$H_2O$$?

Accepted Answer

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

Question 14

Which of the following is a Lewis base?

Accepted Answer

A species that donates an electron pair.

Question 15

Which of the following compounds has the highest boiling point?

Accepted Answer

Ethanol ($$CH_3CH_2OH)$$

Question 16

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

Accepted Answer

Resonance stabilization increases the stability of a conjugate base.

Question 17

Which of the following functional groups is present in the compound $$CH_3COOCH_3$$?

Accepted Answer

Ester

Question 18

Which of the following statements about intermolecular forces is correct?

Accepted Answer

London dispersion forces are present in all molecules.

Question 19

Which of the following is the correct IUPAC name for the organic reactant $$C_2H_4$$?

Accepted Answer

Ethene

Question 20

Which of the following is a correct statement about the physical properties of esters?

Accepted Answer

Esters generally have sweet, pleasant odors.

1 CD. Acid-Base Chemistry in Organic Chemistry: Fundamentals and Applications

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