Question 1

Which of the following best describes the main purpose of evaluating intermolecular forces in a chemical system?

Accepted Answer

To predict and explain physical properties such as boiling and melting points.

Question 2

A student is asked to predict which compound will have the highest boiling point: $\ce{CH_4}$, $\ce{NH_3}$, $\ce{H_2O}$, or $\ce{CO_2}$. Which is correct and why?

Accepted Answer

$\ce{H_2O}$, because it forms strong hydrogen bonds.

Question 3

Which equation correctly relates Gibbs free energy ($\Delta G$), enthalpy ($\Delta H$), entropy ($\Delta S$), and temperature ($T$)?

Accepted Answer

$\Delta G = \Delta H - T\Delta S$

Question 4

A reaction has $\Delta H = -100\ \mathrm{kJ}$ and $\Delta S = -200\ \mathrm{J/K}$. At what temperature (in K) does the reaction become non-spontaneous?

Accepted Answer

500 K

Question 5

Which of the following is NOT a typical laboratory safety rule?

Accepted Answer

Eating and drinking in the lab.

Question 6

Which of the following best describes the relationship between equilibrium constant ($K$) and Gibbs free energy ($\Delta G^\circ$)?

Accepted Answer

$\Delta G^\circ = -RT \ln K$

Question 7

A student mixes 50 mL of 1.0 M $\ce{HCl}$ with 50 mL of 1.0 M $\ce{NaOH}$. What is the final pH of the solution?

Accepted Answer

pH = 7

Question 8

Which of the following statements about entropy ($\Delta S$) is correct?

Accepted Answer

Entropy is a measure of the disorder or randomness of a system.

Question 9

Which of the following is a correct application of Le Chatelier’s Principle?

Accepted Answer

Increasing the temperature of an exothermic reaction shifts equilibrium to the left.

Question 10

A reaction is endothermic and has a positive entropy change. Under what conditions will it be spontaneous?

Accepted Answer

At high temperatures.

Question 11

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

Accepted Answer

It lowers the activation energy and increases the reaction rate.

Question 12

Which of the following is the best example of a colligative property?

Accepted Answer

Boiling point elevation when salt is added to water.

Question 13

A student needs to prepare 250 mL of 0.5 M $\ce{NaCl}$ solution. How many grams of $\ce{NaCl}$ are required? ($M_{\ce{NaCl}} = 58.44\ \mathrm{g/mol}$)

Accepted Answer

7.31 g

Question 14

Which of the following is a correct statement about chemical equilibrium?

Accepted Answer

The concentrations of reactants and products remain constant over time.

Question 15

Which of the following is the best definition of enthalpy ($\Delta H$)?

Accepted Answer

The heat content of a system at constant pressure.

Question 16

Which of the following is a correct example of a spontaneous process?

Accepted Answer

Ice melting at room temperature.

General Chemistry II Syllabus and Course Structure

Study Guide - Practice Questions

Study Guide - Flashcards