After completing the lesson action section of your home page, you are ready to complete your lesson assignment. Follow these steps.

science

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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

 

 

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