Worksheets7.2 Water
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Out of 100% of water that cover the Earth's surface, only ___ makes up fresh water.
a)
97.5%
b)
1.97%
c)
0.5%
d)
2.5%
2.
Kidneys contain about
a)
82% water
b)
31% water
c)
50% water
d)
90% water
3.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
4.
Why is water the most important substance on the planet?
a)
It Dilutes
b)
Drives Climate
c)
Sustains Life
d)
It's Pretty
5.
The furring of kettles or boilers is as a result of the decomposition of Ca(HCO3)2 in hard water into
a)
NaHCO3
b)
NaOH
c)
CaCl2
d)
CaCO3
6.
The boiling point of water is
a)
32 ° F
b)
0 ° F
c)
212 ° F
d)
100 ° F
7.
Temporary hardness is so called because it is easily removed by
a)
adding sodium hydroxide
b)
filtration
c)
neutralisation
d)
boiling
8.
Which of the following is water pollutant?
a)
unburnt hydrocarbon
b)
pesticides
c)
ozone
d)
methane
9.
NaAl2Si4O12 is
a)
zeolite
b)
sodium alkyl benzene sulphonates
c)
sodium aluminate
d)
calcium stearate
10.
Kieserite
a)
Na2CO3.10H2O
b)
CaSO4.2H2O
c)
MgSO4.H2O
d)
CaMg(CO3)2
100 %
