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WorksheetsLifestyle Chemistry
Total questions: 20
Worksheet time: 11mins
Name
Class
Date
1.
Which description best describes a solution
a)
homogenous, will not settle out ,cannot be filtered to separate
b)
separates over time, filters heterogenous
c)
homogenous, separates in layers, not able to be filtered
d)
contains insoluble particles in a mixture
2.
A solution is made by
a)
dissolving a solvent in a solute
b)
dissolving a solute in a solvent
c)
mixing an insoluble substance in a solute
d)
adding an emulsifier to 2 immiscible liquids
3.
A colloid
a)
contains tiny insoluble particles suspended in a solvent for long periods of time
b)
settles out in a few seconds
c)
contains particles much larger than water which sink
d)
contains only soluble particles
4.
The cause of surface tension is
a)
the attraction of water molecules for each other
b)
water is non polar
c)
water is made of large molecules
d)
water molecules have high adhesive forces
5.
To make oil mix with vinegar
a)
it should be shaken
b)
an emulsifier is needed
c)
a surfactant is added
d)
it must be heated
6.
A herbicide
a)
kills insects
b)
kills fish
c)
kills plants
d)
adds nutrients to plants
7.
When egg white is whisked to make meringue
a)
it is a foam emulsion
b)
it is an air in water foam
c)
it is an air in water colloid
d)
it is a suspension
8.
Surface tension is caused by
a)
adhesive forces in water
b)
adhesive forces between molecules
c)
surfactant in water
d)
cohesive forces in water
9.
The meniscus seen in water
a)
is caused by adhesive forces between water and glass
b)
is caused by cohesive forces between water and glass
c)
is due to water being non polar
d)
is what insects can walk on
10.
When oil and water are mixed with an emulsifier
a)
an oil in water suspension is formed
b)
a liquid in solid emulsion is formed
c)
a liquid in liquid colloid is formed
d)
a gas on liquid emulsion is formed
11.
The liquid pictured has a laser light shining through it.
a)
it is a solution
b)
it is a suspension
c)
it is a colloid
d)
it is pure water
12.
The skin has 2 roles - to act as a barrier to pathogens and the outside world and
a)
to sweat
b)
to regulate temperature
c)
to absorb vitamins
d)
to absorb melanin
13.
Microflora is a skin community of
a)
bacteria
b)
bacteria and fungus
c)
bacteria, fungus,viruses
d)
bacteria, fungus and protozoa
14.
pH of the skin is maintained at 6 by
a)
microflora breaking down perspiration
b)
microflora breaking down sebum
c)
microflora breaking down sebum, perspiration and excreting acid
d)
the dermis produces acid
15.
Alcohol is an excellent solvent because it has
a)
a polar end
b)
a non polar end
c)
a polar end and a non polar end
d)
it is a strong acid
16.
Enteric coated tablets
a)
dissolve in the small intestine pH 3
b)
dissolve in the stomach
c)
dissolve in the small intestine pH 9
d)
start dissolving in the stomach
17.
Sub dermal implants release medication by
a)
osmosis
b)
dissolving
c)
diffusion
d)
melting
18.
a medicine that uses alcohol as the solvent is
a)
aftershave
b)
iodine
c)
foundation
d)
perfume
19.
The pH of the stomach, and small intestine is
a)
9 and 3
b)
3 and 9
c)
7 and 9
d)
9 and 6
20.
Which vitamin is water soluble
a)
K
b)
C
c)
E
d)
A
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