Matter And Change

1. Which of the following is a chemical change?

Burning paper

Dissolving salt in water

Cutting magnesium

Grinding crystals

2. Elements and compounds can be classified as

Solutions

Mixtures

Heterogeneous

Substances

3. An example of an intensive property is

Volume

Weight

Melting point

Mass

4. In decomposition (electrolysis for example)

No chemical change takes place

Magnets are used to separate a mixture

No new substances are formed

Bonds are broken in compounds (chemical change)

5. Which state of matter is most likely to undergo significant compression?

Gas

Liquid

Crystalline

Solid

6. Which of the following is made of ions?

Carbon dioxide

Carbon tetrachloride

Silver nitrate

Water

7. Which of the following most closely illustrates the law of definite proportions?

Carbon dioxide cannot be broken down physically

Water is always found in an 8:1 ratio by mass of O:H

Glucose and sucrose are both made of C, H and O.

Water contains a 2:1 ratio by atoms of H:O

8. Which of the following is most metallic?

Sodium

Potassium

Magnesium

Calcium

9. As a solution is boiled its temperature

Gradually rises

Remains constant

Never rises above 100°C

Decreases

10. Which of the following is made of molecules?

Sodium chloride

Germanium

Gold

Fluorine