Comprehensive Foundation In General And Inorganic Chemistry Principles Practice Tests

Question 1

A sample of gas occupies a volume of $2.50\,L$ at a pressure of $1.20\,atm$ and a temperature of $300\,K$. If the volume is compressed to $1.00\,L$ while the temperature is increased to $400\,K$, what is the new pressure of the gas?

Accepted Answer

C. 4.00 atm

Answer

A. 0.36 atm

Answer

B. 2.25 atm

Answer

D. 5.00 atm

Question 2

A mixture of gases contains $0.20\,mol$ of $He$ and $0.30\,mol$ of $Ne$ in a $5.0\,L$ container at $298\,K$. What is the partial pressure of $Ne$ in the container? (Use $R = 0.0821\,L\cdot atm\cdot mol^{-1}\cdot K^{-1}$)

Accepted Answer

B. 1.47 atm

Answer

A. 0.98 atm

Answer

C. 2.45 atm

Answer

D. 0.50 atm

Question 3

Which of the following correctly describes the change in kinetic energy of a gas sample if the absolute temperature is doubled while the volume is halved?

Accepted Answer

D. The total kinetic energy doubles.

Answer

A. The kinetic energy remains constant.

Answer

B. The kinetic energy is halved.

Answer

C. The kinetic energy quadruples.

Question 4

An ion $X^{2-}$ has 18 electrons and 16 neutrons. What is the mass number of this atom?

Accepted Answer

C. 32

Answer

A. 16

Answer

B. 18

Answer

D. 34

Question 5

What is the ground-state electron configuration of the $Fe^{3+}$ ion? (Atomic number of $Fe$ is 26)

Accepted Answer

A. [Ar] 3d^5

Answer

B. [Ar] 4s^2 3d^3

Answer

C. [Ar] 4s^1 3d^4

Answer

D. [Ar] 3d^6

Question 6

Which of the following elements has the highest first ionization energy?

Accepted Answer

C. Neon

Answer

A. Lithium

Answer

B. Carbon

Answer

D. Oxygen

Question 7

Using electronegativity values ($F=4.0, O=3.5, C=2.5, H=2.1$), which bond is the most polar?

Accepted Answer

B. C-F

Answer

A. C-H

Answer

C. C-O

Answer

D. O-H

Question 8

Which of the following molecules has a net dipole moment of zero?

Accepted Answer

A. $CO_2$

Answer

B. $H_2O$

Answer

C. $NH_3$

Answer

D. $CH_3Cl$

Question 9

Which substance would be expected to have the highest boiling point due to the presence of hydrogen bonding?

Accepted Answer

C. $CH_3CH_2OH$

Answer

A. $CH_4$

Answer

B. $CH_3OCH_3$

Answer

D. $CH_3CH_2CH_3$

Question 10

Calculate the total number of oxygen atoms present in $16.0\,g$ of sulfur trioxide ($SO_3$). (Relative atomic masses: $S = 32.0$, $O = 16.0$; Avogadro constant $N_A = 6.02 	imes 10^{23}\,mol^{-1}$)

Accepted Answer

C. $3.61 	imes 10^{23}$

Answer

A. $1.20 	imes 10^{23}$

Answer

B. $2.41 	imes 10^{23}$

Answer

D. $4.82 	imes 10^{23}$

Question 11

In the reaction $2Al(s) + 6HCl(aq) \rightarrow 2AlCl_3(aq) + 3H_2(g)$, calculate the mass of $H_2$ produced when $5.4\,g$ of aluminum reacts with excess hydrochloric acid. (Relative atomic masses: $Al = 27.0$, $H = 1.0$)

Accepted Answer

B. $0.6\,g$

Answer

A. $0.3\,g$

Answer

C. $0.9\,g$

Answer

D. $1.2\,g$

Question 12

Balance the following equation: $aC_3H_8 + bO_2 \rightarrow cCO_2 + dH_2O$. What is the sum of the coefficients $a+b+c+d$ when the equation is balanced with the smallest whole numbers?

Accepted Answer

C. 13

Answer

A. 10

Answer

B. 11

Answer

D. 15

Question 13

Determine the oxidation number of chromium in the dichromate ion, $Cr_2O_7^{2-}$

Accepted Answer

D. +6

Answer

A. +2

Answer

B. +3

Answer

C. +4

Question 14

In the reaction $Zn(s) + CuSO_4(aq) \rightarrow ZnSO_4(aq) + Cu(s)$, identify the reducing agent and the species being oxidized.

Accepted Answer

A. $Zn$ is the reducing agent; $Zn$ is oxidized.

Answer

B. $Zn$ is the oxidizing agent; $Zn$ is reduced.

Answer

C. $Cu^{2+}$ is the reducing agent; $Cu^{2+}$ is oxidized.

Answer

D. $SO_4^{2-}$ is the reducing agent; $SO_4^{2-}$ is oxidized.

Question 15

Given the reaction $2Fe_2O_3 + 3C \rightarrow 4Fe + 3CO_2$, if $160\,g$ of $Fe_2O_3$ (molar mass $160\,g/mol$) reacts with $12\,g$ of $C$ (molar mass $12\,g/mol$), which is the limiting reactant?

Accepted Answer

B. Carbon ($C$)

Answer

A. Iron(III) oxide ($Fe_2O_3$)

Answer

C. Iron ($Fe$)

Answer

D. Carbon dioxide ($CO_2$)

Question 16

What is the oxidation state of nitrogen in the ammonium ion, $NH_4^+$?

Accepted Answer

A. -3

Answer

B. -1

Answer

C. +3

Answer

D. +5

Question 17

Balance the reaction $MnO_4^- + H^+ + Cl^- \rightarrow Mn^{2+} + H_2O + Cl_2$. What is the coefficient of $Cl^-$ when the equation is balanced?

Accepted Answer

C. 10

Answer

A. 2

Answer

B. 5

Answer

D. 16

Question 18

What is the correct IUPAC name for the compound with the formula $Fe_2(SO_4)_3$?

Accepted Answer

Iron(III) sulfate

Answer

Iron(II) sulfate

Answer

Diiron trisulfate

Answer

Iron(II) sulfite

Question 19

Calculate the pH of a solution prepared by dissolving $0.005$ moles of $HCl$ in $500$ mL of water.

Accepted Answer

2.0

Answer

1.0

Answer

3.0

Answer

4.0

Question 20

Which of the following oxides is classified as amphoteric?

Accepted Answer

Al_2O_3

Answer

Na_2O

Answer

SO_3

Answer

CO

Comprehensive Foundation In General And Inorganic Chemistry Principles Practice Tests

Practice Tests

Comprehensive Foundation in General and Inorganic Chemistry Principles

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