Class 9 Chemistry · Chapter 13 · Test 1
Lab Safety and Hazards
24 MCQs covering laboratory safety rules chemical hazards flammable and explosive chemicals corrosive hazards toxic chemicals reactive chemicals radiation hazards asphyxiation hazards and essential safety precautions.
24 questions · 20 min · 24 marks
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Sample questions
The first 5 of 24. Try each one, then tap to see the answer.
Question 1
What should a student do before starting laboratory work?
- ABecome familiar with the laboratory layout and fittings
- BStart the experiment immediately
- CWork alone in the laboratory
- DTaste the chemicals
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Answer: A
Students should become familiar with the laboratory layout and fittings before starting laboratory work.
Question 2
Why should students not work alone in the laboratory?
- ALaboratory work can involve hazards and emergencies
- BExperiments cannot be performed alone for academic reasons
- CThe laboratory equipment cannot be used by students
- DSI units require two students
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Answer: A
Students are expected to perform experiments in the presence of the laboratory instructor and staff because of possible hazards and emergencies.
Question 3
What should be done before using laboratory equipment?
- ACheck that the equipment is working properly
- BWash it with acid
- CMove it outside the laboratory
- DUse it without inspection
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Answer: A
Equipment should be checked before use to ensure that it is working properly according to the experiment requirements.
Question 4
Which activity is prohibited in the laboratory?
- ABringing food items
- BUsing safety equipment
- CFollowing safety instructions
- DWearing a lab coat
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Answer: A
Food items should not be brought into the laboratory.
Question 5
What should a student do instead of directly smelling a gas?
- AWaft the fumes or vapours towards the nose
- BDirectly inhale the gas
- CHeat the gas
- DPour the gas into water
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Answer: A
If smelling a gas is necessary the fumes or vapours should be wafted towards the nose.
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