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 ethanol with 50 mL of water. The resulting solution is best classified as:

Accepted Answer

A homogeneous mixture

Question 4

Which of the following is NOT a chemical property of hydrogen gas?

Accepted Answer

It is less dense than air.

Question 5

Which of the following is classified as an extensive property?

Accepted Answer

Mass

Question 6

A gold bar is best classified as:

Accepted Answer

An element

Question 7

Which of the following processes is an example of a reversible change?

Accepted Answer

Melting chocolate and then re-solidifying it in the freezer

Question 8

Which of the following is NOT a physical property?

Accepted Answer

An iron bar rusts.

Question 9

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

Accepted Answer

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

Question 10

A sample of water is heated from $$25^\circ \mathrm{C} to$$ $$75^\circ \mathrm{C}. $$Which of the following best describes the change?

Accepted Answer

Physical change

Question 11

Which of the following is a homogeneous mixture?

Accepted Answer

A cup of black coffee

Question 12

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

Accepted Answer

Milligrams

Question 13

Which of the following best represents a chemical property?

Accepted Answer

Potassium metal is extremely reactive when placed in water.

Question 14

Which of the following is a correct temperature conversion formula?

Accepted Answer

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

Question 15

Which of the following is a physical change?

Accepted Answer

Dissolving sugar in water

Question 16

Which of the following is NOT a chemical property for an unknown element?

Accepted Answer

It has a yellow-orange color.

Question 17

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

Accepted Answer

Kilogram ($$kg)$$

Question 18

A student observes that a platinum wire glows red when heated. This observation is best classified as:

Accepted Answer

A physical property

Question 19

Which of the following is a compound?

Accepted Answer

Ammonia ($$NH_3)$$

Question 20

Which of the following best describes the difference between heat and temperature?

Accepted Answer

Heat is the transfer of thermal energy from a higher temperature object to a lower temperature object, while temperature is the average kinetic energy of particles.

Introduction to Matter, Properties, and Measurement in General Chemistry

Study Guide - Practice Questions

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