chemistry MCQs
9th • Chapter 13
50 Questions TextBook
1
What is the primary purpose of a chemistry laboratory?
A
A place for students to socializeB
A place to store chemicalsC
A place where a student is trained to observe the physical and chemical characteristics of substancesD
A place for theoretical lectures only2
According to the text, what should you never do in a lab?
B
Taste or smell any compound or gas directlyC
Ask the lab instructor for helpD
Check equipment before use3
Chemicals that cause a sudden release of pressure, gas, and heat when shocked are called?
4
Which of the following is an example of a flammable chemical?
5
What is the correct procedure when mixing concentrated acids with water?
A
Add water to acid rapidlyB
Add acid to water slowlyD
Heat the acid before mixing6
A toxic chemical is defined as a material that is?
C
Poisonous and causes serious health problems7
Which of the following is an example of a toxic chemical mentioned in the text?
8
Reactive chemicals may cause fires and explosions because they can evolve?
9
Which type of radiation causes external injuries?
10
Asphyxiation is a hazard caused by a lack of which gas?
11
Which of the following is an example of an asphyxiant chemical?
12
The hazard sign with a skull and crossbones indicates what type of hazard?
13
What does PPE stand for in a laboratory context?
A
Personal Protective EquipmentB
Primary Prevention EquipmentC
Public Protective EquipmentD
Practical Protective Equipment14
Which piece of equipment is essential for controlling a small fire in the lab?
C
Portable fire extinguisher15
In case of a fire emergency, what is the first recommended action?
A
Run out of the lab immediatelyB
Stay calm and do not panicC
Start cleaning your workspaceD
Continue your experiment16
What type of chemicals are picric acid and nitrocellulose examples of?
17
Which chemical property is described by having a flashpoint around room temperature?
18
Mineral acids, such as HF, and caustic alkalies are examples of what type of hazard?
19
What should you do if you are exposed to a corrosive chemical?
C
Wash the affected area with soap and waterD
Apply another chemical to neutralize it20
Calcium hydride, Na, and Li are examples of which type of chemical?
21
What is the primary danger of alpha and beta particles?
A
They cause external burnsB
They cause extreme damage when inhaled or injectedC
They are highly flammableD
They deplete oxygen levels22
What is a symptom of a decreasing oxygen level due to asphyxiants?
C
Feeling of extreme coldD
Rapid breathing and nausea23
The 'Warning' sign on a chemical bottle signifies that the chemical can cause?
24
Safety in the chemistry laboratory is considered to be?
A
The students' responsibility onlyB
The professor's responsibility onlyC
The lab incharge's responsibility onlyD
A shared responsibility25
The label 'Corrosive' on a chemical bottle indicates that the material?
C
Destroys living tissue on contactD
Degrades rapidly upon exposure26
Picric acid is an example of what type of chemical?
27
What should you do in case of a fire drill in the lab?
A
Run to the safety showerB
Climb into the fume cupboardC
Close gas valves and turn off all equipmentD
Carry chemicals out of the lab28
What is the recommended method for smelling a gas?
A
Inhale deeply from the containerC
Waft the fumes towards your noseD
Ask someone else to smell it29
Why should flammable liquids not be stored in a refrigerator?
B
The refrigerator can provide an ignition sourceC
They will lose their flammabilityD
They will corrode the refrigerator30
Where should experiments with corrosive chemicals be conducted?
31
Which of these is NOT an example of Personal Protective Equipment (PPE)?
32
According to the text, laboratory accidents often result from?
A
Using too much chemicalC
Failure to follow instructions33
What is the purpose of placing warning signs in a laboratory?
B
To ensure every person understands and acts accordingly for safetyC
To list the chemicals availableD
To show the lab's achievements34
Benzoyl peroxide is given as an example of which two types of hazards?
C
Flammable and Asphyxiant35
What is the primary safety measure for handling reactive chemicals?
A
Handling them with bare handsC
Handling them with utmost care and segregationD
Using glassware without any protection36
What should be used to monitor exposure to radiation?
37
If a chemical is inhaled, what is the first step to take?
B
Make the person lie downC
Remove the patient from the contaminated areaD
Ignore it unless symptoms appear38
Periodic drills with compulsory participation are held for what purpose?
A
To practice experimentsB
To handle emergency situationsC
To clean the laboratory39
What is the rule for disposing of non-hazardous laboratory chemical waste?
B
It can be disposed of in a sewer or trash binC
It must be transported to a special siteD
It should be stored indefinitely40
How is hazardous waste material handled for disposal?
A
It is neutralized and poured into the sewerB
It is buried in the lab's backyardC
It is transported to a hazardous waste disposal siteD
It is burned in the fume hood41
Which of the following is NOT listed as a flammable compound?
42
Acetic acid (glacial) is given as an example of what kind of hazard?
43
To avoid breathing corrosive vapours, corrosive chemicals must be used in a?
44
Medical x-rays produce what type of radiation that can affect living tissues?
45
Which hazard is associated with a gas or vapour causing unconsciousness or death through suffocation?
46
What item of PPE is specifically mentioned for use with corrosive chemicals instead of just safety glasses?
B
Splash goggles and a face shield47
To confine a fire, what action is recommended?
A
Open all doors and windowsC
Pour water on all equipmentD
Turn on the ventilation system48
The text advises students not to work alone in the lab and to perform experiments in the presence of whom?
A
Lab instructor and other laboratory staff49
What must be done before using any equipment in the lab?
A
It must be washed with acidC
It should be checked to see if it's working properly50
When should you seek immediate medical help according to the safety instructions for toxic chemicals?
A
Only after finishing your experimentB
If you think you may have been exposedD
Only if you feel severe pain
