Question 1

Which of the following is an example of a physical change?

Accepted Answer

Dissolving sugar in water

Question 2

Which process is a chemical change?

Accepted Answer

Cooking an egg

Question 3

Which of the following best describes a reversible change?

Accepted Answer

Dissolving salt in water

Question 4

Which of the following is NOT a physical change?

Accepted Answer

Combustion of gasoline

Question 5

A student mixes vinegar and baking soda, producing bubbles and a new substance. What type of change is this?

Accepted Answer

Chemical change

Question 6

Which of the following is an example of an irreversible change?

Accepted Answer

Baking a cake

Question 7

Which process involves a phase change from liquid to gas?

Accepted Answer

Evaporation

Question 8

Which of the following best describes the process of sublimation?

Accepted Answer

Solid to gas

Question 9

Which of the following is a sign of a chemical change?

Accepted Answer

Formation of a precipitate

Question 10

A student heats blue copper(II) sulfate crystals, which turn white and release water vapor. What type of change is this?

Accepted Answer

Physical change

Question 11

Which equation represents a chemical change?

Accepted Answer

$$ \mathrm{2H_2 (g)} + \mathrm{O_2$ (g)} \rightarrow \mathrm{2H_2O (l)} $$

Question 12

Which of the following is a physical property that can change during a physical change?

Accepted Answer

Change in state (solid, liquid, gas)

Question 13

Which process is best classified as a reversible physical change?

Accepted Answer

Melting ice

Question 14

Which of the following is NOT a sign of a chemical change?

Accepted Answer

Change in state

Question 15

Which of the following best describes condensation?

Accepted Answer

Gas to liquid

Physical and Chemical Changes in Matter

Guida di studio - Domande di pratica