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