Question 1

Which of the following best defines chemistry?

Accepted Answer

The study of the composition, structure, properties, and reactions of matter.

Question 2

Which of the following is NOT considered matter?

Accepted Answer

Sunlight

Question 3

A forensic scientist analyzes a blood sample to determine its chemical composition. Which property of chemistry is primarily being investigated?

Accepted Answer

Composition

Question 4

Which chemical in toothpaste is responsible for preventing the formation of cavities by strengthening tooth enamel?

Accepted Answer

Sodium fluorophosphate

Question 5

When an antacid tablet is dropped into water, a chemical reaction occurs. Which of the following best describes what is happening?

Accepted Answer

The tablet reacts with water, producing new substances.

Question 6

Which of the following statements about chemicals is TRUE?

Accepted Answer

Chemicals have the same composition and properties wherever they are found.

Question 7

Which function does calcium carbonate serve in toothpaste?

Accepted Answer

Used as an abrasive to remove plaque

Question 8

Hemoglobin in blood is responsible for which of the following?

Accepted Answer

Transporting oxygen to tissues and carbon dioxide to lungs

Question 9

Which of the following is a chemical reaction?

Accepted Answer

Burning wood to produce ash and smoke

Question 10

A student claims that toothpaste is not made of chemicals because it is a mixture. Which statement best corrects this misconception?

Accepted Answer

Toothpaste is made of chemicals because it contains substances with definite composition and properties.

Question 11

Which property of matter is being investigated when a scientist studies how a substance reacts with another?

Accepted Answer

Reaction

Question 12

Which of the following is an example of a chemical found in fruit?

Accepted Answer

Vitamin C ($$C_6H_8O_6)$$

Question 13

Which toothpaste ingredient is used to loosen plaque?

Accepted Answer

Sodium lauryl sulfate

Question 14

Which of the following best describes matter?

Accepted Answer

Anything that occupies space and has mass

Question 15

A chemical reaction occurs when an antacid tablet is dropped into water. Which equation best represents this process?

Accepted Answer

$$\mathrm{$$NaHCO_3$$} + \mathrm{H^+} \rightarrow \mathrm{Na^+} + \mathrm{CO_2$} + \mathrm{H_2O}$$

Question 16

Which of the following is NOT a function of chemicals in toothpaste?

Accepted Answer

Digesting food particles

Question 17

Which of the following everyday items contains chemicals?

Accepted Answer

Fruit

Question 18

Which property of a chemical is being described when toothpaste is said to be white and opaque due to titanium dioxide?

Accepted Answer

Physical property

Question 19

Which of the following is a correct statement about chemicals?

Accepted Answer

Chemicals can be found in both natural and synthetic substances.

Question 20

A scientist is studying the way hemoglobin transports gases in the blood. Which aspect of chemistry is being investigated?

Accepted Answer

Structure and function

Chapter 1: Chemistry in Our Lives – Introduction to Chemistry and Chemicals

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