LG06 - Physical and Chemical Changes of Matter

1.

Multiple Choice

30 sec

1 pt

Which state symbol best describes the phase of the substance shown in this particle view diagram?

(s)

(l)

(g)

(aq)

2.

Multiple Choice

30 sec

1 pt

Which of the following best describes the phase of this substance?

compressible with fixed shape

compressible with changeable shape

rigid with fixed shape

rigid with changeable shape

3.

Multiple Choice

30 sec

1 pt

Which of the following shows the phase of a substance whose shape and volume cannot change?

4.

Multiple Choice

30 sec

1 pt

Which state symbol best describes the phase of NaCl in this particle view diagram?

(s)

(l)

(g)

(aq)

5.

Multiple Choice

30 sec

1 pt

Which of the following formulas could be represented by this diagram?

AlF₃(g)

AlF₃ (l)

NH₃ (g)

NH₃ (s)

6.

Multiple Choice

45 sec

1 pt

Intermolecular forces (IMFs) are responsible for...

bonding atoms together

attracting molecules to each other

attracting electrons in the sea of electrons

holding electrons in an atom

7.

Multiple Choice

30 sec

1 pt

Which of the following best describes the change shown in this diagram?

Physical change because a new substance was created.

Physical change because no new substance was created.

Chemical change because a new substance was created.

Chemical change because no new substance was created.

8.

Multiple Choice

30 sec

1 pt

Which of the following best describes the change shown in this diagram?

Physical change because a new substance was created.

Physical change because no new substance was created.

Chemical change because a new substance was created.

Chemical change because no new substance was created.

9.

Multiple Select

45 sec

1 pt

Which of the following are examples of a chemical change?

liquid nitrogen boiling

cells producing energy

water freezing

vinegar and baking soda fizzing

10.

Multiple Select

45 sec

1 pt

Which of the following are examples of physical change?

liquid nitrogen boiling

burning coal

water melting

paper being cut into smaller pieces

11.

Multiple Choice

30 sec

1 pt

Increasing the temperature of a substance causes the molecules to...

move faster

move slower

break their bonds

do nothing

12.

Multiple Choice

30 sec

1 pt

For most substances, the phase of matter that has the highest density is...

solid

liquid

gas

aqueous

13.

Multiple Choice

30 sec

1 pt

Which of the following best explains what is happening in this picture?

IMFs are becoming weaker as the bubble breaks

IMFs are becoming stronger as the bubble breaks

Bonds are becoming weaker as the bubble breaks

Bonds are becoming stronger as the bubble breaks

14.

Multiple Choice

1 min

1 pt

Which of the following best explains the difference in ending temperatures between substances A and B?

A had weaker IMFs because it evaporated faster

A had stronger IMFs because it evaporated faster

B had weaker IMFs because it evaporated faster

B had stronger IMFs because it evaporated faster

15.

Multiple Choice

30 sec

1 pt

What phase will C₈H₁₈ be in at a temperature of 98ºC?

solid

liquid

gas

16.

Multiple Choice

30 sec

1 pt

What phase will Fe₃O₄ be in at a temperature of 1200ºC?

solid

liquid

gas

17.

Multiple Choice

30 sec

1 pt

What phase will Cl₂ be in at a temperature of 25ºC?

solid

liquid

gas

18.

Multiple Choice

45 sec

1 pt

Based on this table of melting and boiling points, which substance has the weakest IMFs?

Cl₂

C₈H₁₈

Fe₃O₄

19.

Multiple Choice

45 sec

1 pt

At room temperature, Br₂ is a liquid and Cl₂ is a gas. Which of the following best explains this difference?

Br₂ has weaker IMFs than Cl₂

Br₂ has stronger IMFs than Cl₂

Br₂ has weaker bonds than Cl₂

Br₂ has stronger bonds than Cl₂

20.

Multiple Choice

30 sec

1 pt

Which of the following separation techniques could you use to separate an insoluble solid from a liquid?

(Hint: insoluble means that the substance will not dissolve)

crystallization

distillation

filtration

chromatography

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