Worksheet Chapter 1: Introduction to Chemistry

1. True or False: Mercury spills can be safely cleaned up using water and a cotton cloth.

2. Describe the correct procedure to manage a small mercury spill on a laboratory bench.

3. A student accidentally spills concentrated hydrochloric acid onto his lab coat and arm. Outline the immediate action steps required to safely handle this emergency.

4. An experiment is carried out to investigate how the temperature of water affects the dissolving rate of sugar. Identify: (a) Manipulated variable (b) Responding variable (c) Two fixed variables

5. Define what a 'hypothesis' is in a scientific investigation.

6. State two examples of chemical chemicals used as food preservatives in the food industry.

7. Which item of apparatus should be used when handling volatile chemicals that release hazardous vapors?

8. True or False: Alkali metals such as sodium and potassium must be stored under paraffin oil.

9. Fill in the blank: The word 'chemistry' originates from the Arabic word ________.

10. Identify three types of variables involved in a scientific investigation and briefly define each.