Identify the apparatus shown in figure 21, its uses and labelled parts. List three hazards in a laboratory.

a) The apparatus shown is a Bunsen burner.
The final answer is $\boxed{\text{Bunsen burner}}$

b) The apparatus is used for heating substances.
The final answer is $\boxed{\text{heating}}$

c) Identify the following labelled parts and their function.

• D - Base. Its function is to provide stability for the Bunsen burner.
• C - Collar (or air hole regulator). Its function is to control the amount of air entering the burner, which regulates the type and temperature of the flame.

22. A hazard is anything that has the potential of causing harm or injury. Three such hazards that can occur in the laboratory are: i. Chemical spills (e.g., corrosive acids, flammable liquids). ii. Broken glassware (leading to cuts). iii. Fires or burns (from open flames or hot apparatus).