Question 1

Which of the following molecules exhibits hydrogen bonding as its predominant intermolecular force?

Accepted Answer

CH\_3OH

Question 2

A solution is prepared by dissolving 9.50 g of toluene (C\_7H\_8) in 225 g of benzene (C\_6H\_6). The concentration of toluene in the resulting solution is 0.417 m. What does the unit 'm' represent in this context?

Accepted Answer

Molality

Question 3

Which of the following best explains why ice floats on liquid water?

Accepted Answer

Ice is less dense than liquid water due to hydrogen bonding.

Question 4

Which of the following is an endothermic process?

Accepted Answer

Sublimation of dry ice

Question 5

A sample of gas is placed in a container at room temperature. The gas spontaneously disperses throughout the room because:

Accepted Answer

The entropy of the system increases

Question 6

Which of the following aqueous solutions will have the highest boiling point?

Accepted Answer

0.10 m Na\_2SO\_4

Question 7

The process of doping can produce an n-type semiconductor, which can greatly increase electronic conductivity. What is doping?

Accepted Answer

Adding atoms with more valence electrons than the host

Question 8

Which of the following best describes the effect of increasing temperature on the solubility of most solids in water?

Accepted Answer

Solubility increases

Question 9

Which of the following is the correct expression for the entropy change ($$\Delta S) $$for a reversible process?

Accepted Answer

$$\Delta S = \frac{q_{rev}}{T}$$

Question 10

A heating curve for a pure substance is shown. The segment with a constant temperature but increasing heat flow corresponds to:

Accepted Answer

A phase change

Question 11

Which of the following best describes the role of a catalyst in a chemical reaction?

Accepted Answer

It lowers the activation energy, increasing the reaction rate.

Question 12

Which of the following is true for a buffer solution?

Accepted Answer

It resists changes in pH when small amounts of acid or base are added.

Question 13

Which of the following is the strongest acid?

Accepted Answer

HClO\_4

Question 14

Which of the following best describes the effect of adding a nonvolatile solute to a solvent?

Accepted Answer

The boiling point of the solution increases.

Question 15

Which of the following is a property of a metallic solid?

Accepted Answer

Good electrical conductivity

Question 16

Which of the following best describes the effect of increasing pressure on the solubility of a gas in a liquid?

Accepted Answer

Solubility increases

Question 17

Which of the following is the correct expression for Henry's Law?

Accepted Answer

$$C = k_P P_{gas}$$

Question 18

Which of the following is a colligative property?

Accepted Answer

Freezing point depression

Question 19

Which of the following best describes the effect of a catalyst on the activation energy of a reaction?

Accepted Answer

It lowers the activation energy.

Question 20

Which of the following is the correct expression for the equilibrium constant ($$K) $$for the reaction $$aA + bB \rightleftharpoons cC + dD$$?

Accepted Answer

$$K = \frac{[C]^c [D]^d}{[A]^a [B]^b}$$

General Chemistry II: Study Guide for Chapters 11–19 (Intermolecular Forces, Solids, Solutions, Kinetics, Equilibria, Thermodynamics, and Environmental Chemistry)

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