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mcqs of
,
1 : Safety in the Chemistry laboratory is:
1
:
The responsibility of the students only
2
:
The responsibility of the professor only
3
:
That responsibility of the lab in charge only
4
:
A shared responsibility
2 : The label "Warning" on and chemical bottle signifies:
1
:
That the chemical can cause less serious injury
2
:
That the chemical can cause serious injury
3
:
That user should be careful when using chemical
4
:
That user should open it only in the presence of a teacher
3 : Example of self-reactive chemical:
1
:
Potassium
2
:
Phenol
3
:
Picric acid n- Hexane
4
:
Hexane
4 : The label "Corrosive" on a chemical bottle indicates:
1
:
That the material is an oxidizing agent
2
:
That the material can degrade rapidly upon exposure
3
:
That its contact destroy living tissue
4
:
That the chemical can explode
5 : Example of highly toxic chemical:
1
:
Ethanol
2
:
Acetic acid
3
:
Potassium cyanide
4
:
Potassium permanganate
6 : Accident often result form:
1
:
Making mistakes
2
:
Failure to use common sense
3
:
Failure to following instruction
4
:
All of the above
7 : When diluting an acid with water:
1
:
Do it quickly
2
:
Do not stir the container
3
:
Always add acid to water
4
:
Always add water to acid
8 : What should you do in case of a fire drill in the lab?
1
:
Run to safety shower
2
:
Climb into the fume cupboard
3
:
Close gas valves and turn off all equipment
4
:
Carry chemical out of the lab
Chapter 13 : Laboratory and Practical Skills
Chemistry 9th MCQs || Ilam Ghar
Chemistry 9th
