Question 1

Which of the following best describes a solution in chemistry?

Accepted Answer

A homogeneous mixture of two or more substances at the molecular level.

Question 2

A student dissolves 58.5 g of NaCl (molar mass = 58.5 g/mol) in enough water to make 1.00 L of solution. What is the molarity of the solution?

Accepted Answer

$$1.00\ \mathrm{M}$$

Question 3

Which of the following statements about chemical equilibrium is correct?

Accepted Answer

At equilibrium, the rates of the forward and reverse reactions are equal.

Question 4

Consider the reaction: $$\mathrm{N_2$(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)}. If $$the concentration of $$\mathrm{NH_3$} is $$increased, what will happen according to Le Chatelier's Principle?

Accepted Answer

The equilibrium will shift to the left, favoring the formation of $$\mathrm{N_2$}$$ and $$\mathrm{H_2$}.$$

Question 5

Which of the following is a strong acid?

Accepted Answer

$$\mathrm{HCl}$$

Question 6

A buffer solution is prepared by mixing equal concentrations of acetic acid ($$\mathrm{CH_3COOH}) $$and sodium acetate ($$\mathrm{CH_3COONa}). $$What will happen to the pH if a small amount of HCl is added?

Accepted Answer

The pH will decrease slightly, but the buffer will resist a large change.

Question 7

Which of the following salts will produce a basic solution when dissolved in water?

Accepted Answer

$$\mathrm{Na_2CO_3}$$

Question 8

Which of the following best describes a redox reaction?

Accepted Answer

A reaction involving the transfer of electrons between species.

Question 9

In an electrochemical cell, which direction do electrons flow?

Accepted Answer

From the anode to the cathode through the external circuit.

Question 10

A reaction has a rate law: $$	ext{rate} = k[\mathrm{A}]^2[\mathrm{B}]. If $$the concentration of $$\mathrm{A} is $$doubled and $$\mathrm{B} is $$halved, by what factor does the rate change?

Accepted Answer

The rate increases by a factor of 2.

Question 11

Which of the following is a characteristic property of transition elements?

Accepted Answer

They often form colored compounds.

Question 12

Which of the following best describes a coordination compound?

Accepted Answer

A compound consisting of a central metal ion bonded to surrounding ligands.

Question 13

Which of the following nuclear reactions is an example of alpha decay?

Accepted Answer

$$^{238}\mathrm{U} \$$rightarrow ^{234}$$\mathrm{Th} $$+ ^{4}$$\mathrm{He}$$

Question 14

Which of the following statements about the rate-determining step in a reaction mechanism is correct?

Accepted Answer

It is the slowest step in the mechanism and limits the overall reaction rate.

Question 15

Which of the following is a real-world application of electrochemistry?

Accepted Answer

Batteries used in mobile phones.

Question 16

Which of the following best explains why $$\mathrm{AgCl} is $$sparingly soluble in water?

Accepted Answer

Its lattice energy is much greater than its hydration energy.

Question 17

Which of the following is a correct statement about main-group elements?

Accepted Answer

They include the s- and p-block elements in the periodic table.

Question 18

Which of the following is a common ligand in coordination chemistry?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 19

Which of the following best describes the function of a salt bridge in a galvanic cell?

Accepted Answer

It maintains electrical neutrality by allowing the flow of ions.

Question 20

Which of the following is a practical application of nuclear chemistry?

Accepted Answer

Medical imaging using radioactive isotopes.

ICCH 102 General Chemistry II - Course Syllabus and Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard