Question 1

Which of the following best describes a chemical change?

Accepted Answer

Burning wood in a campfire

Question 2

Which of the following is an example of an intensive property?

Accepted Answer

Density

Question 3

A student mixes 50 mL of water with 50 mL of ethanol. Which type of change is this?

Accepted Answer

Physical change

Question 4

Which of the following is NOT a chemical property?

Accepted Answer

It has a yellow-orange color

Question 5

Which of the following is classified as an extensive property?

Accepted Answer

Mass

Question 6

Which of the following is a homogeneous mixture?

Accepted Answer

A cup of black coffee

Question 7

Which of the following is a correct conversion from Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 8

Which of the following is a pure substance?

Accepted Answer

Gold bar

Question 9

A scientist observes that a platinum wire glows red when heated. This is an example of which type of property?

Accepted Answer

Physical property

Question 10

Which of the following is NOT an example of an intensive property?

Accepted Answer

Milligrams

Question 11

Which of the following is the correct scientific notation for 0.00000325?

Accepted Answer

$$3.25 	imes 10$$^{-6}$$

Question 12

Which of the following is a reversible change?

Accepted Answer

Melting a chocolate bar then re-solidifying it in the freezer

Question 13

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements that are chemically bonded together

Question 14

Which of the following is a correct temperature conversion from Celsius to Fahrenheit?

Accepted Answer

$$^\circ F = 1.8(^\circ C) + 32$$

Question 15

Which of the following is NOT a physical property?

Accepted Answer

An iron bar rusts.

Question 16

Which of the following is a chemical property of hydrogen gas?

Accepted Answer

It reacts explosively with oxygen gas.

Question 17

Which of the following is a correct statement about mixtures?

Accepted Answer

A homogeneous mixture has a uniform composition throughout.

Question 18

Which of the following is the SI base unit for mass?

Accepted Answer

Kilogram ($$kg)$$

Question 19

A student observes that a sample of iron rusts when exposed to air. This observation is best classified as:

Accepted Answer

A chemical property

Question 20

Which of the following is NOT an example of a reversible change?

Accepted Answer

Cooking an egg

Fundamental Concepts in Chemistry: Matter, Properties, and Measurement

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