Question 1

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements chemically combined in fixed proportions.

Question 2

Which of the following is an example of a homogeneous mixture?

Accepted Answer

Air

Question 3

Which process is an example of a physical change?

Accepted Answer

Dissolving sugar in water

Question 4

Which of the following is NOT a chemical change?

Accepted Answer

Melting of ice

Question 5

A student measures the mass of a sample as 0.00450 g. How many significant figures are in this measurement?

Accepted Answer

3

Question 6

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

Accepted Answer

Breaking a glass

Question 7

Which of the following is a pure substance?

Accepted Answer

Lead metal

Question 8

Which of the following statements about mixtures is correct?

Accepted Answer

Mixtures have variable composition.

Question 9

Which of the following is an example of a chemical property?

Accepted Answer

Ability to rust

Question 10

Which of the following is an exact number?

Accepted Answer

The number of students in a classroom

Question 11

Which of the following is a heterogeneous mixture?

Accepted Answer

Granite

Question 12

Which of the following is a physical property?

Accepted Answer

Density

Question 13

Which of the following is a chemical change?

Accepted Answer

Burning gasoline

Question 14

Which of the following is the correct formula for water?

Accepted Answer

$\mathrm{H_2O}$

Question 15

Which of the following is NOT a unit in the International System of Units (SI)?

Accepted Answer

Pound

Question 16

A student records the measurement 2.30 m. How many significant figures are in this measurement?

Accepted Answer

3

Question 17

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

Accepted Answer

Boiling water

Question 18

Which of the following is a chemical change that occurs in the human body?

Accepted Answer

Metabolism of food

Question 19

Which of the following is a correct statement about significant figures?

Accepted Answer

Zeros at the end of a number and to the right of a decimal point are always significant.

Question 20

Which of the following is a correct example of a compound?

Accepted Answer

$\mathrm{NaCl}$

Chapter 1: Matter, Measurement & Problem Solving – Study Notes

Study Guide - Practice Questions