CHEM 102 WINTER EXAM
Q&A
2023
Answers on Last Page
1. Please choose the letter “a” as your answer for this question.
2. If a liquid is soluble in water, some part of the molecule is and therefore .
a. nonpolar; hydrophobic
b. nonpolar; hydrophilic
c. bipolar; inert
d. polar; hydrophilic
e. polar; hydrophobic
3. Ethanol and water dissolve in each other in all proportions. Therefore,
a. ethanol is miscible with water.
b. ethanol is immiscible with water.
c. water is miscible with ethanol.
d. water is immiscible with ethanol.
e. both a and c are correct
4. Which of the following is incorrect?
a. substances with similar intermolecular forces are likely to be soluble in each other
b. solutes do not readily dissolve in solvents whose intermolecular forces are quite
different from their own
c. weaker solute-solvent attractions favor solubility
d. stronger solute-solute attractions reduce solubility
e. stronger solvent-solvent attractions reduce solubility
5. The phrase "like dissolves like" refers to the fact that
a. gases can only dissolve other gases.
b. polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar
solutes.
c. solvents can only dissolve solutes of similar molar mass.
d. condensed phases can only dissolve other condensed phases.
e. polar solvents dissolve nonpolar solutes and vice versa.
6. A solution with solute concentration less than the solubility is said to be ; solute will
dissolve in such a solution.
a. undersaturated; more
b. undersaturated; no more
c. saturated; more
, d. saturated; no more
e. supersaturated; more
Q&A
2023
Answers on Last Page
1. Please choose the letter “a” as your answer for this question.
2. If a liquid is soluble in water, some part of the molecule is and therefore .
a. nonpolar; hydrophobic
b. nonpolar; hydrophilic
c. bipolar; inert
d. polar; hydrophilic
e. polar; hydrophobic
3. Ethanol and water dissolve in each other in all proportions. Therefore,
a. ethanol is miscible with water.
b. ethanol is immiscible with water.
c. water is miscible with ethanol.
d. water is immiscible with ethanol.
e. both a and c are correct
4. Which of the following is incorrect?
a. substances with similar intermolecular forces are likely to be soluble in each other
b. solutes do not readily dissolve in solvents whose intermolecular forces are quite
different from their own
c. weaker solute-solvent attractions favor solubility
d. stronger solute-solute attractions reduce solubility
e. stronger solvent-solvent attractions reduce solubility
5. The phrase "like dissolves like" refers to the fact that
a. gases can only dissolve other gases.
b. polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar
solutes.
c. solvents can only dissolve solutes of similar molar mass.
d. condensed phases can only dissolve other condensed phases.
e. polar solvents dissolve nonpolar solutes and vice versa.
6. A solution with solute concentration less than the solubility is said to be ; solute will
dissolve in such a solution.
a. undersaturated; more
b. undersaturated; no more
c. saturated; more
, d. saturated; no more
e. supersaturated; more
