After completing the lesson action section of your home page, you are ready to complete your lesson assignment. Follow these steps.
science
Description
Instructions:
After completing the lesson
action section of your home page, you are ready to complete your lesson
assignment. Follow these steps.
a) In the textbox given,
explain the strategy that you used to determine your answer.
b) Fill in your answer. The
mark for each question is given at the introduction to the questions to be
completed.
c) When finished answering
all your questions, save your file and upload the file into the appropriate
dropbox.
Part A (Using the Concepts):
Multiple Choice: (59 marks) Each question is worth different marks according to the strategy
used. If calculations are required, the
mark for the strategy will worth more marks and the final answer will be worth
one mark.
Identify the choice that best completes the statement or answers
the question. Your choices are given
below the text box. Make sure you
include your strategy.
____ 1. (two
marks) One method of corrosion prevention for iron is the use of protective
coatings. Which type of coating would most likely be the most effective over a
long period of time?
|
|
|
a. |
nickel |
d. |
wax |
|
b. |
chromium |
e. |
steel |
|
c. |
plastic |
|
|
____ 2. (two
marks) Corrosion of iron is accelerated by
|
|
|
a. |
low humidity |
d. |
low temperature |
|
b. |
lack of oxygen |
e. |
nonelectrolytes |
|
c. |
low pH |
|
|
____ 3. (two
marks) Galvanized steel is an effective method of corrosion prevention for
all of the following reasons except
|
|
|
a. |
Zinc is a more active metal than iron. |
|
b. |
Zinc is less electronegative than
iron. |
|
c. |
Zinc forms a protective layer on the
iron. |
|
d. |
Zinc is a relatively hard metal
compared to iron. |
|
e. |
A spontaneous cell is created when the
zinc coating is broken. |
____ 4. (two
marks) The kinetic molecular theory includes all of the following except
|
|
|
a. |
molecules attract one another |
|
b. |
particles are small compared to the
volume they occupy |
|
c. |
molecules move in straight line motion |
|
d. |
molecules collide elastically with one
another |
|
e. |
molecules collide elastically with
surrounding objects |
____ 5. (two
marks) An example of a physical change process in a chemical industry is
|
|
|
a. |
deposit of gold on a metal through
electrolysis |
|
b. |
decomposition of limestone in the
Solvay process |
|
c. |
combustion of sulfur in the contact
process for sulfuric acid |
|
d. |
recovery of salt by evaporation of
water from a salt lake |
|
e. |
production of ammonia from nitrogen
and hydrogen in the Haber process |
____ 6. (two
marks) An example of a chemical change process in a chemical industry is
|
|
|
a. |
crude oil fractionally distilled in an
oil refinery |
|
b. |
recovery of salt by evaporation of
water from a salt lake |
|
c. |
lime added to water to produce slaked
lime in the Solvay process |
|
d. |
nitrogen condensed from air for use in
the Haber process |
|
e. |
CFCs from automobile air conditioners
diffuse in the upper atmosphere |
____ 7. (two
marks) The reaction of silver nitrate with zinc would be classified as a
|
|
|
a. |
combustion reaction |
d. |
decomposition reaction |
|
b. |
synthesis reaction |
e. |
single displacement reaction |
|
c. |
double displacement reaction |
|
|
____ 8. (two
marks) Baking soda can be used to neutralize some battery acid that has
leaked or spilled. This reaction would be classified as a
|
|
|
a. |
synthesis reaction |
d. |
single displacement reaction |
|
b. |
decomposition reaction |
e. |
double displacement reaction |
|
c. |
combustion reaction |
|
|
