Question 1

Which of the following best describes the physical state and particle arrangement of a solid?

Accepted Answer

Particles are close together in a fixed arrangement; definite shape and volume.

Question 2

A sample of copper is hammered into a thin sheet. Which type of change is this, and why?

Accepted Answer

Physical change, because only the shape of copper changes.

Question 3

Which of the following is a chemical property?

Accepted Answer

Silver can tarnish when exposed to air.

Question 4

Which scenario best illustrates a chemical change?

Accepted Answer

A piece of wood burning to produce ash, carbon dioxide, and water.

Question 5

Which of the following statements about gases is correct?

Accepted Answer

Gases have an indefinite shape and volume, and their particles are far apart and move rapidly.

Question 6

A student heats sugar in a pan until it turns brown and produces a caramel aroma. What type of change has occurred?

Accepted Answer

Chemical change, because new substances with different properties are formed.

Question 7

Which of the following is NOT a physical property?

Accepted Answer

Iron rusts when exposed to moisture.

Question 8

Which of the following best describes the state of matter for vegetable oil at room temperature?

Accepted Answer

Liquid, because it has a definite volume but takes the shape of its container.

Question 9

A student observes that a silver knife becomes dull and dark after being left out in the air. This is an example of:

Accepted Answer

A chemical change, because a new substance (tarnish) forms.

Question 10

Which of the following changes is a physical change?

Accepted Answer

Melting ice cream.

Question 11

Which property of copper makes it suitable for use in electrical wiring?

Accepted Answer

It is an excellent conductor of electricity.

Question 12

Which of the following best describes a liquid?

Accepted Answer

Indefinite shape and definite volume.

Question 13

A balloon filled with air is punctured and the air escapes, filling the entire room. Which property of gases does this demonstrate?

Accepted Answer

Gases have an indefinite shape and volume.

Question 14

Which of the following is an example of a physical property being used to separate a mixture?

Accepted Answer

Using a magnet to remove iron particles from a mixture.

Question 15

Which of the following is a correct statement about physical and chemical changes?

Accepted Answer

A chemical change results in the formation of one or more new substances.

Question 16

A student places a metal spoon in boiling water. After a few minutes, the spoon becomes hot. Which property of the metal is being demonstrated?

Accepted Answer

Physical property: the metal conducts heat.

Question 17

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

Accepted Answer

Ice forming in a freezer.

Question 18

Which of the following best explains why water takes the shape of its container but does not fill the entire volume like a gas?

Accepted Answer

Water is a liquid; its particles are close together but mobile, giving it a definite volume and indefinite shape.

Question 19

Which of the following is a chemical change that occurs in everyday life?

Accepted Answer

Toasting a marshmallow over a campfire.

Question 20

A student observes that a candle melts when left in the sun. This is an example of:

Accepted Answer

A physical change, because only the state of the candle changes.

States and Properties of Matter: Chapter 3 Study Notes (GOB Chemistry)

Guida di studio - Domande di pratica