Basic Technique of Handling Chemical & Apparatus

What type of clothing is appropriate to wear in the laboratory?

• flip flops

• sandals

• closed-toe shoes

• loose-fitting clothes

How should you wear your long hair when running an experiment in the laboratory?

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Which two things should you do in the case of a chemical spill on your skin or clothing?

• sit quietly, wipe it off

• wipe it off, rinse with plenty of water

• inform the teacher, rinse with plenty of water

• wipe it off, remove clothing

What should you do with leftover chemicals after completing an experiment?

• Dump them in the sink.

• Take them home with you.

• Dump them into the original container.

• Dump them in the sink with the teacher's permission or dump them in the provided waster container.

When are you allowed to perform any laboratory work?

• after you collect your materials

• after you have read the instructions

• after you have read the instructions when your teacher is present

• when your Zoom partner is present

The following are some safety rules in a laboratory. Which one is not correct?

• Do not eat or drink in the laboratory

• Do not report any injury, however small, to the teacher

• Do not taste chemicals in the laboratory

• Do not run in the laboratory

Which of the following apparatus is the best one to use for measuring a fixed volume of liquid accurately?

• Beaker

• Cup

• Gas jar

• Pipette

Mohammad uses a Bunsen burner. He closes the air-hole. The flame of the burner will be __________.

• Colourless

• Blue

• Non-luminous

• Luminous

Which of the following is the proper technique of lighting a Bunsen burner?

• Close the air hole -> Turn the gas tap on -> Light the burner

• Open the air hole -> Turn the gas tap on -> Light the burner

• Turn the gas tap on -> Light the burner -> Close the air hole

• Turn the gas tap on -> Open the air on -> Light the burner

The diagram below show four positions of the eye when taking the reading of the volume of a liquid in a measuring cylinder. Which position of the eye would give an accurate volume?

• A

• B

• C

• D