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BIO Exam 2C 2015
Test Description: Unit 2 exam part 3
Instructions: Answer all questions to get your test result.
1) water is a chemical
A
TRUE
B
I HAVE NO IDEA
C
FALSE
D
ONLY WHEN IT IS LIQUID
2) the oxygen atom in a water molecule
A
attracts electrons more weakly, making it partially negatively charged
B
attracts electrons more weakly, making it partially positively charged
C
attracts electrons more strongly, making it partially negatively charged
D
attracts electrons more strongly, making it partially positively charged
3) most of the water on earth can be found as
A
fresh water in the oceans
B
fresh water ice at the poles
C
salt water in the oceans
D
in lakes and streams
4) acids have a pH
A
less than 10
B
Above 7
C
Between 3 and 9
D
Below 7
5) ice floats on water because
A
of the freezing point of water
B
it is less dense
C
of condensation
D
water contracts when it freezes
6) which properties of water are due to hydrogen bonding
A
all of the rest are correct
B
cohesion, adhesion, and capillary action
C
water's high heat capacity
D
surface tension
7) which is the strongest base?
A
vinegar
B
ammonia
C
eggs
D
lemon juice
8) the polarity of the water molecule is due to its ______ and _____ sharing of electrons
A
size, equal
B
shape, unequal
C
shape, equal
D
size, unequal
9) the boiling point of water is
A
122 degrees farenheit
B
none of the above
C
100 degrees centigrade
D
100 degrees farenheit
10) which of these is an example of a solution?
A
orange juice
B
rice in water
C
breakfast cereal and milk
D
pizza
*select an answer for all questions
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