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WorksheetsIntroduction to chemsitry
Total questions: 10
Worksheet time: 8mins
An experiment is carried out to study the solubility of sodium chloride in water and in benzene. What is the
(i) manipulated variable and
(ii) constant variable
of the experiment?
(i)water and bezene and (ii) rate of stirring
(i) water and bezene and (ii) mass of sodium chloride
(i) water and (ii) volume of solvent
(i) bezene and (ii) rate of stirring
An experiment should be carried out in the fume cupboard if it involves
the release of poisonous gas.
the release of flammable gas.
the use of corrosive chemicals.
the use of oxidising chemicals.
protects from inhaling harmful air particles as dust, vapour, fumes and gases
mask
Googles
A protective mask
Eyes cleaner
provides protection to the eyes
Eyes drops
Protective mask
Safety googles
Sunglasses
a small box containing items such as bandages, plasters, and antiseptic wipes for use in giving help to a sick or injured person until full medical treatment is available.
First aid kit
cabinet
fire extinguisher
Fume chamber
instrument used to transfer liquids or fine-grained materials into containers with small openings. Also used for filtration
pipette
funnel
beaker
What tool is this?
Beaker
Test Tube and Holder
Graduated Cylinder
Pipette
Before you leave the science room, you should...
Clean your work area and equipment
Return all equipment to the proper storage area
Wash your hands with soap and water
All of the above
When you finish working with chemicals, living things, and other lab substances, always...
Treat your hands with skin lotion
Wash your hands thoroughly with soap and water
Wipe your hands on a towel
Wipe your hands on your clothes
The following activity is allowed in the lab...
Chewing gum
Eating
Drinking
None of the above
