Question 1

Which of the following statements best explains why n-pentane has a higher boiling point than neopentane?

Accepted Answer

n-Pentane has a greater surface area, leading to stronger London dispersion forces.

Question 2

Which of the following molecules can form hydrogen bonds with itself?

Accepted Answer

CH\_3CH\_2OH

Question 3

What is the main intermolecular force present in a sample of methane (CH\_4)?

Accepted Answer

London dispersion forces

Question 4

Which of the following best describes a Lewis acid?

Accepted Answer

A species that accepts a pair of electrons to form a new bond

Question 5

Which of the following factors increases the acidity of a molecule the most?

Accepted Answer

Delocalization of negative charge by resonance

Question 6

Which of the following compounds is most likely to have the highest dipole moment?

Accepted Answer

H\_2O

Question 7

Which of the following statements about acid-base equilibria is correct?

Accepted Answer

The equilibrium favors the formation of the weaker acid and the weaker base.

Question 8

Which of the following is the correct expression for the acid dissociation constant ($$K_a) $$for the reaction $$HA + H_2O \rightleftharpoons H_3O^+ + A^-$$?

Accepted Answer

$$K_a = \frac{[H_3O^+][A^-]}{[HA]}$$

Question 9

Which of the following functional groups is present in all carboxylic acids?

Accepted Answer

—COOH

Question 10

Which of the following statements about the effect of electronegativity on acidity is correct?

Accepted Answer

A more electronegative atom stabilizes the negative charge on the conjugate base, increasing acidity.

Question 11

Which of the following best explains why HI is a stronger acid than HF?

Accepted Answer

The larger size of I\^- allows better stabilization of the negative charge.

Question 12

Which of the following is a correct statement about the relationship between acid and conjugate base strength?

Accepted Answer

A strong acid has a weak conjugate base.

Question 13

Which of the following compounds is most likely to be soluble in water due to hydrogen bonding?

Accepted Answer

CH\_3CH\_2OH

Question 14

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

Accepted Answer

Resonance delocalizes negative charge, stabilizing the conjugate base and increasing acidity.

Question 15

Which of the following is a correct statement about the hybridization effect on acidity?

Accepted Answer

The more s-character in the hybrid orbital, the stronger the acid.

Question 16

Which of the following is a correct definition of a nucleophile?

Accepted Answer

A species that donates a pair of electrons to form a new covalent bond

Question 17

Which of the following functional groups is present in all amides?

Accepted Answer

A carbonyl group bonded to a nitrogen atom

Question 18

Which of the following best describes the main force responsible for the boiling point of nonpolar molecules like hexane?

Accepted Answer

London dispersion forces

Question 19

Which of the following statements about the inductive effect is correct?

Accepted Answer

Electron-withdrawing groups stabilize the conjugate base, increasing acidity.

Question 20

Which of the following is the correct IUPAC name for a hydrocarbon with a triple bond between the first and second carbon atoms in a four-carbon chain?

Accepted Answer

but-1-yne

Chapter 2: Acids and Bases; Functional Groups – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards