Safety in the Laboratories

What does this symbol mean?

• Environmental Toxicity
• Harmfull/Irritant
• Corrosives
• Acute Toxicity

Which of the following is incorrect about lab safety?

• Students must not enter or work in laboratories unless a teacher is present.
• It is OK for me to drink in the lab as long as I do not eat.
• Safety goggles must be worn whenever there is any risk of injury to the eyes.
• Wash hands thoroughly after all practical works.

If you break a beaker in the lab, the first thing you should do is

• Report to your teacher
• Clean up the broken glass using bare hands
• Put the broken glass in sharps & broken bin
• Carefully pick up the broken pieces using tongs and/or small brush with dustpan

Which of the following procedure is incorrect?

• Light the Bunsen burner with the air hole open
• Light the Bunsen burner with the air hole closed
• The lit Bunsen burners should not be leave unattended
• Always point the top ends of test tubes away from people when doing heating

Select the two examples where proper safety precautions are observed.

• D & E
• B & C
• C & D
• A & C

Which of the following statements is/are correct?

• Wash hands thoroughly after all practical works
• Chipped or cracked glassware should not be used
• Unlabelled chemicals should not be used
• All of the above

Which of the following statement on Electrical Safety is correct?

• Power points can be overload
• Electrical equipment with exposed cables can be use
• Do not touch electrical appliances with wet hands
• Do attempt to repair an electrical device

What does this symbol means?

• Harmful/Irritant
• Acute Toxicity
• Environmental Toxicity
• Explosives

When heating liquid in test tube, one should 

• Close test tube tightly with cork
• Hold test tubes at a slant (slope) pointed away from everyone
• Hold the test tube pointing upward
• None of the above

Which of the following statement on glassware safety is correct?

• All breakages should be recorded in a breakage form yearly
• Glassware should not be stored in a secure and convenient manner
• Chipped glassware can be used
• Broken glasses to be disposed into the waste bin