Question 1

Which of the following best describes the process of sublimation?

Accepted Answer

A solid changing directly into a gas without passing through the liquid state.

Question 2

What is the main intermolecular force responsible for capillary action in water?

Accepted Answer

Hydrogen bonding

Question 3

Which of the following statements about boiling point is correct?

Accepted Answer

It is the temperature at which the vapor pressure of a liquid equals the external pressure.

Question 4

A sample of dry ice (solid CO$$_2) is $$left on a table and disappears without forming a liquid. Which process is occurring?

Accepted Answer

Sublimation

Question 5

Which of the following best describes the process of deposition?

Accepted Answer

A gas changing directly into a solid.

Question 6

Which property explains why water can move up narrow tubes against gravity?

Accepted Answer

Capillary action

Question 7

Which of the following is true about the melting point of a substance?

Accepted Answer

It is the temperature at which a solid turns into a liquid.

Question 8

Which process is the reverse of evaporation?

Accepted Answer

Condensation

Question 9

A beaker of water is placed in a freezer. After several hours, the water turns into ice. Which process has occurred?

Accepted Answer

Freezing

Question 10

Which of the following best describes surface tension?

Accepted Answer

The force that acts on the surface of a liquid and tends to minimize the area of the surface.

Question 11

Which process is responsible for the formation of frost on a cold window?

Accepted Answer

Deposition

Question 12

Which of the following is NOT a phase change?

Accepted Answer

Surface tension

Question 13

Which process occurs when water vapor turns into liquid water on a cold surface?

Accepted Answer

Condensation

Question 14

Which of the following best describes the boiling process?

Accepted Answer

A liquid changing into a gas throughout the liquid, not just at the surface.

Question 15

Which of the following is an example of evaporation?

Accepted Answer

A puddle of water gradually disappearing on a hot day.

States of Matter and Phase Changes: Key Concepts and Definitions

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