Question 1

Which of the following best describes the difference between a crystalline solid and an amorphous solid?

Accepted Answer

A crystalline solid has a regular ordered structure, while an amorphous solid lacks long-range order.

Question 2

Which process is represented by the direct transition from a solid to a gas, as shown in the phase diagram?

Accepted Answer

Sublimation

Question 3

When sodium chloride (NaCl) dissolves in water, what type of interaction primarily occurs between the ions and water molecules?

Accepted Answer

Ion-dipole interactions

Question 4

Which of the following solutions will conduct electricity most effectively?

Accepted Answer

A solution of sodium chloride (NaCl) in water

Question 5

Which of the following statements about electrolytes is correct?

Accepted Answer

A strong electrolyte dissociates completely in water and conducts electricity well.

Question 6

Geckos can walk on walls due to which type of intermolecular force?

Accepted Answer

London dispersion forces

Question 7

Which of the following molecules would have the highest boiling point due to hydrogen bonding?

Accepted Answer

H2O

Question 8

Which of the following best explains why ice floats on water?

Accepted Answer

Ice is less dense than liquid water due to its open hydrogen-bonded structure.

Question 9

Which of the following is NOT a property of gases?

Accepted Answer

They are virtually incompressible.

Question 10

A sample of gas occupies 4.0 L at 2.0 atm. If the pressure is increased to 8.0 atm at constant temperature, what is the new volume?

Accepted Answer

$$1.0\ \mathrm{L}$$

Question 11

Which equation correctly represents Boyle’s Law?

Accepted Answer

$$P_1V_1 = P_2V_2$$

Question 12

A balloon has a volume of 785 mL at $$21\ ^\circ\mathrm{C}. If $$the temperature drops to $$0\ ^\circ\mathrm{C} at $$constant pressure, what is the new volume?

Accepted Answer

$$729\ \mathrm{mL}$$

Question 13

Which of the following is the correct form of the ideal gas law?

Accepted Answer

$$PV = nRT$$

Question 14

Calculate the number of moles of $$CO_2$$ gas generated if a sample occupies $$0.250\ \mathrm{L} at$$ $$1.3\ \mathrm{atm}$$ and $$31\ ^\circ\mathrm{C}$$. ($$R = 0.0821\ \mathrm{L\ atm\ $$mol^{-1}$$\ K$$^{-1}$$})$$

Accepted Answer

$$0.013\ \mathrm{mol}$$

Question 15

Which of the following substances will be the least soluble in water?

Accepted Answer

C6H6

Question 16

Which intermolecular force is present in all molecules, whether polar or nonpolar?

Accepted Answer

London dispersion forces

Question 17

A gas has a volume of 675 mL at $$35\ ^\circ\mathrm{C}$$ and 0.850 atm. What is the volume at $$-95\ ^\circ\mathrm{C}$$ and 802 mmHg? ($$1\ \mathrm{atm} = 760\ \mathrm{mmHg})$$

Accepted Answer

$$314\ \mathrm{mL}$$

Question 18

Which of the following best explains why 'like dissolves like' in solutions?

Accepted Answer

Solutions form most readily when both solute and solvent have similar intermolecular forces.

Question 19

Which of the following is a property of an ideal gas according to the kinetic-molecular theory?

Accepted Answer

Gas particles have negligible attractive or repulsive forces between them.

Study Guide: Gases, Liquids, Solids, and Intermolecular Forces

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