Page 14 - Ranger SPM 2022 - Science

Science SPM Chapter 1 Safety Measures in the Laboratory
Practice

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Objective Questions

1. Which of the following is the function 4. Which of the following is the correct
of a face mask? match regarding biological waste
A Protects the nose and mouth from disposal?
smoke, vapour, dust and volatile
chemical substances Biological Disposal
B Protects the mouth from harmful waste method
microorganisms that could cause
diseases A Syringe, Wrapped with
Form 4
C Protects the nose and mouth from needle and biohazard plastic
harmful ultraviolet and radioactive scalpel and disposed into
rays rubbish bin
D Protects the face from splashes
of chemical substances that could B Gloves Packaged in
injure the face and culture biohazard plastic
medium and autoclaved
2. Which of the following experiments C Animal Wrapped with
must be carried out in a fume chamber? carcass tissue and buried
A Boiling distilled water in the ground
B Sublimation of iodine to gas
C Generating electricity using citric D Blood Stored in biohazard
acid bag and autoclaved
D Reaction of amylase enzyme and
starch
5. While conducting an experiment in
3. Which of the following substances can HOTS the laboratory, a student accidentally
HOTS
be disposed of into sinks? drops a thermometer causing the bulb
which contains mercury to break. What
P : Mercury action needs to be taken to handle the
Q : Acidic solution with pH 5-6 mercury spillage?
R : Alkaline solution with pH 9 A Wipe the spillage using a cloth
S : Organic solvent compounds B Pour sulphur on the spillage and
call the fire department
A P and Q C Pour sand on the spillage and call
B P and R the fire department
C Q and R D Immediately leave the area of the
D R and S mercury spillage

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