Question 1

Which of the following best describes a supersaturated solution?

Accepted Answer

A solution that contains more dissolved solute than the normal solubility limit and is unstable.

Question 2

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

Accepted Answer

Decreasing temperature and increasing pressure.

Question 3

Which of the following is the correct net ionic equation for the reaction: $$2\ \mathrm{Na_3PO_4\ (aq)} + 3\ \mathrm{$$CaCl_2$$\ (aq)} \rightarrow 6\ \mathrm{NaCl\ (aq)} + \mathrm{Ca_3$(PO_4$)_2\ (s)}}$$?

Accepted Answer

$$2\ \mathrm{PO_4$^{3-}\ (aq)} + 3\ \mathrm{Ca$$^{2+}$$\ (aq)} \rightarrow \mathrm{Ca_3$(PO_4$)_2\ (s)}}$$

Question 4

According to the Brønsted–Lowry definition, which of the following is the acid in the reaction $$\mathrm{NH_3$\ (aq) + H_2O\ (l) \rightleftharpoons NH_4$^+\ (aq) + OH^-\ (aq)}}$$?

Accepted Answer

$$\mathrm{H_2O} is $$the acid, and $$\mathrm{OH^-} is $$its conjugate base.

Question 5

Consider the reaction: $$\mathrm{N_2$ + 3H_2 \rightarrow 2NH_3}. $$What happens to the oxidation state of nitrogen?

Accepted Answer

N is reduced – oxidation state changes from 0 to -3.

Question 6

Which of the following reactions will occur based on the activity series of metals?

Accepted Answer

$$\mathrm{Zn\ (s) + $$MnI_2$$\ (aq) \rightarrow $$ZnI_2$$\ (aq) + Mn\ (s)}$$

Question 7

Which of the following statements about intermolecular forces in liquids is correct?

Accepted Answer

They are strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past one another.

Question 8

Which of the following molecules does NOT form hydrogen bonds with itself?

Accepted Answer

$$\mathrm{C_2H_5CHO}$$

Question 9

Identify the correct order in the boiling points, highest to lowest, of the following molecules: $$\mathrm{CH_4$, C_2H_6, C_3H_8, C_4H_{10}}.$$

Accepted Answer

$$\mathrm{C_4H_{10} \u003e C_3H_8 \u003e C_2H_6 \u003e CH_4$}$$

Question 10

Which of the following statements about viscosity is true?

Accepted Answer

Viscosity increases as molecular weight increases and as intermolecular forces increase.

Question 11

Which of the following statements is NOT true regarding the interaction between hydrogen peroxide ($$\mathrm{H_2O_2}) $$and methanol ($$\mathrm{CH_3OH}$$)?

Accepted Answer

$$\mathrm{H_2O_2}$$ and $$\mathrm{CH_3OH}$$ will exert ion-dipole forces between each other.

Question 12

Which of the following best explains why water has a higher boiling point than methane ($$\mathrm{CH_4$}$$)?

Accepted Answer

Water forms hydrogen bonds, which are stronger than the London dispersion forces in methane.

Question 13

Which of the following statements about vapor pressure is correct?

Accepted Answer

A substance with weak intermolecular forces will have a high vapor pressure.

Question 14

Which of the following is the dominant intermolecular force in ammonia ($$\mathrm{NH_3$}$$)?

Accepted Answer

Hydrogen bonding

Question 15

Which of the following best describes the relationship between boiling point and intermolecular forces?

Accepted Answer

Boiling point increases as intermolecular forces increase.

Question 16

Which of the following is true about the phase diagram of a substance?

Accepted Answer

The triple point is where the solid, liquid, and gas phases coexist in equilibrium.

Question 17

Which of the following statements about surface tension is correct?

Accepted Answer

Surface tension increases as intermolecular forces increase.

Question 18

Which of the following best describes the role of a metal in a single displacement reaction?

Accepted Answer

The metal is always the reducing agent.

Question 19

Which of the following is a correct statement about conjugate acid-base pairs?

Accepted Answer

A conjugate acid-base pair differs by one $$\mathrm{H^+}$$ ion.

General Chemistry Exam Review: Solutions, Solubility, Ionic Equations, Acids/Bases, Redox, IMFs, and Phase Diagrams

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