Particulate Nature of Matter & Chemical Changes

Particulate Nature of Matter & Chemical Changes

By Angela Toh

Multiple Choice

The three states of matter are represented by diagrams X, Y and Z. Which change occurs during condensation?

• X to Y

• X to Z

• Y to X

• Z to X

Multiple Choice

Particles of all matter are in constant random motion.

• True
• False

Multiple Choice

It is the densest among all state of matter

• Solid
• Liquid
• Gas
• Plasma

Multiple Choice

The particles of liquids ________________

• vibrate about their fixed postions

• are able to slide over each other

• move about freely at high speeds and in random direction

• do not move

Multiple Choice

The changes that occur when a substance changes state are shown below.

Which process, W, X, Y or Z, is occurring in the following four situations?

1 Butter melts on a warm day.

2 Water condenses on a cold surface.

3 The volume of liquid ethanol in an open beaker reduces.

4 Ice forms inside a freezer

• 1: W, 2:X, 3:Y, 4:Z

• 1: W, 2:Y, 3:X 4:Z

• 1: X, 2:Y, 3:Z, 4:W

• 1: X, 2:Z, 3:Y, 4:W

Multiple Choice

How many changes of state occur in this graph?

• 1

• 2

• 3

Multiple Choice

What line segment represents only the solid state?

• A-B
• B-C
• C-D
• D-E

Multiple Choice

Use the diagram to answer the question. Julian removes boiling water from a heat source and places it in a freezer. He then records the water’s temperature as it freezes. The diagram represents the data recorded.

Which segment of the diagram shows where the molecules of water will have the least energy?

• segment A

• segment B

• segment C

• segment D

• segment E

Multiple Choice

In which segment is the kinetic energy remaining constant?

• A-B
• B-C
• C-D
• E-F

Multiple Choice

A green powder is heated & a gas is given off while it turns to a black solid. This describes

• Physical Change

• Chemical Change

• Change in State

• Change in Temperature

Multiple Choice

A molecule is created when the same _________ is bonded together. For example: C₁₀

• Element

• Compound

• Homogeneous Mixture

• Heterogeneous Mixture

Multiple Choice

Which of the following is a heterogeneous mixture?

• brass

• sand

• Kool-aid

• vanilla yogurt

Multiple Choice

What type of mixture would fruit salad be?

• homogeneous

• heterogeneous

Multiple Choice

What type of mixture would coffee be?

• homogeneous

• heterogeneous

Multiple Choice

What is the percentage atom economy for the formation of ethane in the reaction below?

• 100%

• 30%

• 28%

• 60%

Multiple Choice

Calculate the % atom economy of 2KClO₃ → 2KCl + 3O₂

using the given relative atomic masses: O = 16, K = 39, Cl = 35

• 24%

• 96%

• 30%

• 60%