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mcqs of
,
1 : Safety in the Chemistry laboratory is:
A
:
The responsibility of the students only
B
:
The responsibility of the professor only
C
:
That responsibility of the lab in charge only
D
:
A shared responsibility
2 : The label "Warning" on and chemical bottle signifies:
A
:
That the chemical can cause less serious injury
B
:
That the chemical can cause serious injury
C
:
That user should be careful when using chemical
D
:
That user should open it only in the presence of a teacher
3 : Example of self-reactive chemical:
A
:
Potassium
B
:
Phenol
C
:
Picric acid n- Hexane
D
:
Hexane
4 : The label "Corrosive" on a chemical bottle indicates:
A
:
That the material is an oxidizing agent
B
:
That the material can degrade rapidly upon exposure
C
:
That its contact destroy living tissue
D
:
That the chemical can explode
5 : Example of highly toxic chemical:
A
:
Ethanol
B
:
Acetic acid
C
:
Potassium cyanide
D
:
Potassium permanganate
6 : Accident often result form:
A
:
Making mistakes
B
:
Failure to use common sense
C
:
Failure to following instruction
D
:
All of the above
7 : When diluting an acid with water:
A
:
Do it quickly
B
:
Do not stir the container
C
:
Always add acid to water
D
:
Always add water to acid
8 : What should you do in case of a fire drill in the lab?
A
:
Run to safety shower
B
:
Climb into the fume cupboard
C
:
Close gas valves and turn off all equipment
D
:
Carry chemical out of the lab
9 : What is the flashpoint of flammable chemicals?
A
:
High
B
:
Low
C
:
Room temperature
D
:
Zero
10 : Which chemical is an example of an explosive?
A
:
Benzene
B
:
Picric acid
C
:
Acetone
D
:
Ether
11 : What should be done with acids and bases before disposal?
A
:
Pour
B
:
Neutralize
C
:
Store
D
:
Mix
12 : How should you mix concentrated acids with water?
A
:
Water to acid
B
:
Acid to water
C
:
Mix randomly
D
:
Heat first
13 : What should you do if you suspect a chemical might explode?
A
:
Move it
B
:
Shock it
C
:
Avoid moving it
D
:
Heat it
14 : What is the first step when working with hazardous chemicals?
A
:
Start experiment
B
:
Get approval
C
:
Ignore safety
D
:
Work alone
15 : What is the purpose of Personal Protective Equipment (PPE) in the lab?
A
:
Decorate
B
:
Reduce exposure
C
:
Increase risk
D
:
Save time
16 : Why is it important to know the location of a fire extinguisher?
A
:
To decorate
B
:
To control small fires
C
:
To ignore emergencies
D
:
To increase risk
17 : Which is an example of a toxic chemical?
A
:
Benzene
B
:
Water
C
:
Salt
D
:
Sugar
18 : What should students do during an emergency drill?
A
:
Panic
B
:
Stay calm
C
:
Ignore
D
:
Run away
19 : Which of the following is NOT a category of hazardous chemicals in the lab?
A
:
Cleaners
B
:
Disinfectants
C
:
Food
D
:
Gas cylinders
20 : What is the purpose of warning signs in a lab?
A
:
Decorate
B
:
Indicate hazards
C
:
Replace equipment
D
:
Provide instructions
21 : What is the purpose of warning signs in the lab?
A
:
Decorate
B
:
Indicate
C
:
Replace
D
:
Instruct
22 : What should you wear when handling corrosive chemicals?
A
:
Gloves
B
:
Goggles
C
:
Face shield
D
:
All
23 : What is a reactive chemical example?
A
:
Sodium
B
:
Water
C
:
Salt
D
:
Sugar
24 : What should you do when you see a warning sign in the lab?
A
:
Ignore it
B
:
Be alert
C
:
Remove it
D
:
Work faster
25 : Why are rigorous rules necessary in a lab?
A
:
To avoid accidents
B
:
To save time
C
:
To reduce cost
D
:
To decorate
26 : What do signs on chemical bottles indicate?
A
:
Brand name
B
:
Precautions
C
:
Expiry date
D
:
Price
27 : What is a key requirement for lab safety?
A
:
Follow signs
B
:
Work alone
C
:
Ignore rules
D
:
Do experiments
28 : What is the correct way to smell a gas in the lab?
A
:
Inhale
B
:
Waft
C
:
Taste
D
:
Ignore
29 : Which of the following is NOT a part of PPE?
A
:
Lab coat
B
:
Face shield
C
:
Fire extinguisher
D
:
Protective glasses
30 : What should you do with radioactive materials?
A
:
Shield them
B
:
Expose them
C
:
Ignore safety
D
:
Heat them
31 : What is an example of an asphyxiant gas?
A
:
Oxygen
B
:
Carbon monoxide
C
:
Water vapor
D
:
Nitrogen oxide
Chemistry 9th MCQs || Ilam Ghar
Chapter 13 : Laboratory and Practical Skills
Chemistry 9th
