Question 1

Which of the following is NOT an example of a Lewis acid-base reaction?

Accepted Answer

$$\mathrm{Na^+} + \mathrm{Cl^-} \rightarrow \mathrm{NaCl}$$

Question 2

According to the Lewis definition, an acid is a species that:

Accepted Answer

Accepts a pair of electrons

Question 3

Which of the following elements in Group 1A has the highest first ionization energy?

Accepted Answer

Li

Question 4

A sample of magnesium contains 80.0 g. How many moles of magnesium are present? ($$\mathrm{Mg}$$ atomic mass = $$24.3\ \mathrm{g/mol})$$

Accepted Answer

$$3.29\ \mathrm{mol}$$

Question 5

Which of the following compounds is most likely to exhibit covalent bonding?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 6

A 1.00 L sample of helium gas at a pressure of 350 mmHg and a temperature of 300 K is compressed so that the gas occupies 0.500 L and the pressure is increased to 700 mmHg. What is the final temperature of the gas?

Accepted Answer

$$600\ \mathrm{K}$$

Question 7

Which of the following changes will increase the yield of ammonia in the reaction $$\mathrm{N_2$} + 3\mathrm{H_2$} \rightleftharpoons 2\mathrm{NH_3$}$$ ($$\Delta H = -92\ \mathrm{kJ}$$)?

Accepted Answer

Increasing the concentration of hydrogen

Question 8

Which of the following is the strongest oxidizing agent based on the standard reduction potentials below?

$$\begin{align*}
\mathrm{Na^+} + e^- &ightarrow \mathrm{Na} \quad E^\circ = -2.71\ \mathrm{V} \
\mathrm{Cu$$^{2+}$$} + 2e^- &ightarrow \mathrm{Cu} \quad E^\circ = 0.34\ \mathrm{V} \
\mathrm{Cl_2$} + 2e^- &ightarrow 2\mathrm{Cl^-} \quad E^\circ = 1.36\ \mathrm{V} \
\mathrm{Al$$^{3+}$$} + 3e^- &ightarrow \mathrm{Al} \quad E^\circ = -1.66\ \mathrm{V}
\end{align*}$$

Accepted Answer

$$\mathrm{Cl_2$}$$

Question 9

Which of the following statements about the boiling point of water is correct?

Accepted Answer

It increases as atmospheric pressure increases

Question 10

Which of the following is a characteristic of a chemical reaction at equilibrium?

Accepted Answer

The rates of the forward and reverse reactions are equal

Question 11

A solution is prepared by dissolving 58.5 g of NaCl in enough water to make 1.00 L of solution. What is the molarity of the solution? ($$\mathrm{NaCl}$$ molar mass = $$58.5\ \mathrm{g/mol})$$

Accepted Answer

$$1.00\ \mathrm{M}$$

Question 12

Which of the following gases will have the highest rate of effusion through a small hole at the same temperature and pressure?

Accepted Answer

$$\mathrm{H_2$}$$

Question 13

Which of the following best describes the bonding in $$\mathrm{SO_2$}$$?

Accepted Answer

Resonance between two structures with one double and one single bond

Question 14

Which of the following will increase the solubility of a gas in water?

Accepted Answer

Decreasing the temperature

Question 15

Which of the following is the correct balanced equation for the combustion of $$\mathrm{C_2H_6} in $$oxygen?

Accepted Answer

$$2\mathrm{C_2H_6} + 7\mathrm{O_2$} \rightarrow 4\mathrm{CO_2$} + 6\mathrm{H_2O}$$

Question 16

Which of the following ions has the largest radius?

Accepted Answer

$$\mathrm{Cl^-}$$

Question 17

Which of the following statements about catalysts is correct?

Accepted Answer

Catalysts decrease the activation energy of a reaction

Question 18

Which of the following is the correct net ionic equation for the reaction between $$\mathrm{$$AgNO_3$$}$$ and $$\mathrm{NaCl} in $$aqueous solution?

Accepted Answer

$$\mathrm{Ag^+} + \mathrm{Cl^-} \rightarrow \mathrm{AgCl}$$

Question 19

Which of the following best explains why $$\mathrm{H_2O}$$ has a higher boiling point than $$\mathrm{H_2S}$$?

Accepted Answer

Water has stronger hydrogen bonding

Question 20

Which of the following is the correct electron configuration for $$\mathrm{Fe$$^{3+}$$}$$?

Accepted Answer

$$[\mathrm{Ar}]\ 3d^5$

ACS General Chemistry Practice Test 1A – Study Guide

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