BIO Exam 2C 2015 Question Preview (ID: 27219)


Unit 2 Exam Part 3. TEACHERS: click here for quick copy question ID numbers.

the polarity of the water molecule is due to its ______ and _____ sharing of electrons
a) size, equal
b) shape, unequal
c) size, unequal
d) shape, equal

which is the strongest base?
a) ammonia
b) lemon juice
c) vinegar
d) eggs

which properties of water are due to hydrogen bonding
a) all of the rest are correct
b) water's high heat capacity
c) surface tension
d) cohesion, adhesion, and capillary action

ice floats on water because
a) it is less dense
b) water contracts when it freezes
c) of the freezing point of water
d) of condensation

acids have a pH
a) Below 7
b) Above 7
c) Between 3 and 9
d) less than 10

most of the water on earth can be found as
a) salt water in the oceans
b) fresh water ice at the poles
c) fresh water in the oceans
d) in lakes and streams

the oxygen atom in a water molecule
a) attracts electrons more strongly, making it partially negatively charged
b) attracts electrons more strongly, making it partially positively charged
c) attracts electrons more weakly, making it partially negatively charged
d) attracts electrons more weakly, making it partially positively charged

water is a chemical
a) TRUE
b) FALSE
c) ONLY WHEN IT IS LIQUID
d) I HAVE NO IDEA

the boiling point of water is
a) 100 degrees farenheit
b) 100 degrees centigrade
c) 122 degrees farenheit
d) none of the above

which of these is an example of a solution?
a) pizza
b) orange juice
c) breakfast cereal and milk
d) rice in water

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