Final answer:
True statements about igniting a Bunsen burner include having the gas supply turned on, it being connected to gas, and using a striker. Objects should not be near the burner to prevent accidental fires. Safety measures include working in a well-ventilated area and managing flammable materials and loose clothing.
Step-by-step explanation:
The question relates to the proper use and ignition of a Bunsen burner, which is a common tool used in chemistry labs. The accurate statements for the provided sentence fragments would be:
- True: A Bunsen burner can be ignited when the gas supply is turned on.
- True: When it is connected to a gas supply.
- True: By holding the striker above the burner and striking it.
- False: When objects are nearby and can ignite. (Objects should not be near the burner as they increase the risk of unintentional ignition and fire.)
Safety precautions include ensuring that no flammable substances are close by and that loose clothing and long hair are secured. Working in a well-ventilated space is also crucial due to the combustion process in Bunsen burners, which involves the reaction of methane and oxygen to form carbon dioxide and water.
Additionally, never leave an open flame unattended, and always be aware of fire safety equipment's location within the lab. Being alert and careful while handling any lab equipment, particularly when chemicals and hot glassware are involved, is of utmost importance.