Question 1

Which of the following best describes the scientific method as used in chemistry?

Accepted Answer

A systematic process involving observation, hypothesis formation, and experimentation to expand knowledge.

Question 2

Which of the following is a chemical property of matter?

Accepted Answer

Ability to react with acid

Question 3

A student observes that when nickel is added to hydrochloric acid, the solution turns green and bubbles form. What evidence indicates a chemical reaction has occurred?

Accepted Answer

The solution changes color and gas is produced.

Question 4

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

Accepted Answer

Boiling water to produce steam.

Question 5

Which state of matter has a definite volume but takes the shape of its container?

Accepted Answer

Liquid

Question 6

Butane has a melting point of $$-138.4\ ^\circ\mathrm{C}$$ and a boiling point of $$-0.5\ ^\circ\mathrm{C}. $$What is its state at room temperature ($$25\ ^\circ\mathrm{C}$$)?

Accepted Answer

Gas

Question 7

Which of the following is NOT a physical property?

Accepted Answer

Ability to burn in air

Question 8

Which of the following best describes a chemical change?

Accepted Answer

A rearrangement of atoms resulting in new substances with different properties.

Question 9

Which of the following is a sign that a chemical reaction has occurred?

Accepted Answer

All of the above

Question 10

Which of the following is a real-life example of a chemical change?

Accepted Answer

Bread rising due to yeast producing $$\mathrm{CO}_2.$$

Question 11

Which of the following best explains why onions make you cry?

Accepted Answer

Onions release a volatile sulfur compound that reacts with your tears to form sulfuric acid.

Question 12

Which of the following is a chemical property of baking soda?

Accepted Answer

Decomposes at $$270\ ^\circ\mathrm{C} to $$give off water and carbon dioxide

Question 13

Which of the following is NOT evidence of a chemical reaction?

Accepted Answer

A change in state from solid to liquid

Question 14

Which of the following best describes the relationship between chemistry and other sciences?

Accepted Answer

Chemistry is the central science that connects and overlaps with many other scientific fields.

Question 15

Which of the following is an example of a physical property of water?

Accepted Answer

Boiling point of $$100\ ^\circ\mathrm{C}$$

Question 16

Which of the following best describes a gas?

Accepted Answer

Has neither a definite shape nor a definite volume

Question 17

Which of the following is a multi-step process involving both physical and chemical changes?

Accepted Answer

Burning a candle (wax melts, then combusts to form $$\mathrm{CO}_2$$ and $$\mathrm{H}_2\mathrm{O})$$

Question 18

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

Accepted Answer

Physical changes do not alter the molecular composition of a substance.

Question 19

Which of the following is an example of a chemical reaction that occurs in everyday life?

Accepted Answer

Baking soda reacting with vinegar to produce $$\mathrm{CO}_2$$ gas

Question 20

Which of the following best describes the composition of water?

Accepted Answer

11.2% hydrogen and 88.8% oxygen

Chapter 1: Chemistry and Matter – Foundations of General Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard