GEN CHEM 1

1. WHICH OF THE FOLLOWING IS NOT AN EXAMPLE OF PHYSICAL PROPERTIES?

• BOILING

• MELTING

• COLOR

• CHEMICAL REACTION

2. It describes how the chemical structure of matter changes during a chemical reaction.

• CHEMICAL REACTION

• PHYSICAL PROPERTIES

• CHEMICAL PROPERTIES

• CHEMISTRY

3. Which of the following is an example of element?

• Na

• NaCl

• CO2

• H2O

4. Sand and water is an example of ___________.

• heterogeneous mixture

• mixture

• element

• homogeneous mixture

5. It is a process by which we learn about the natural universe by observing, testing and then generating models that explain our observations.

• SCIENTIFIC METHOD

• SCIENTIFIC NOTATION

• SCIENCE

• CHEMISTRY

6. Express each large number using scientific notation.

2, 300, 000, 000

• 2.3 x 10⁹

• 2.3 x 10⁶

• 2.30 x 10⁹

• 2.3 0x 10⁶

7. Express each small number using scientific notation.

0.000000326

• 32.6 x 10^-7

• 3.26 x 10^-7

• 32.6 x 10^-6

• 3.26 x 10^-6

8. Scientific inquiry begins with...

• A problem to solve or a question to answer

• Observation

• Laboratory tests

• A checklist of procedures

9. What is the simplest form that cannot be broken down to anything simpler? 

• COMPOUND

• MIXTURE

• ELEMENT

• NONE OF THE ABOVE

Which of these is a pure substance?

• BREAD

• GARDEN OIL

• SEA WATER

• TABLE SALT