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Corrosion

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.

What is oxidation?

a)

A reaction involving oxygen

b)

A reaction involving non-metals

2.
Is this an example of oxidation?
a)
Yes
b)
No
3.
Which of the following statement is WRONG?
a)
The process of losing the electron is called Oxidation
b)
An oxidation reaction is often called a cathodic reaction
c)
The process of receiving the electron is called Reduction
d)
A reduction reaction is often called a cathodic reaction
4.
Is the following equation an example of oxidation?
Cu + O2 ---> 2 CuO
a)
Yes
b)
No
5.
Is the following equation an example of oxidation?
Na + Cl ----> NaCl
a)
Yes
b)
No
6.
What is corrosion?
a)
The release of oxygen
b)
Breakdown of a metal
7.
Is this an example of corrosion?
a)
Yes
b)
No
8.

Name the two general classifications of corrosion.

a)

Direct chemical attack and Electrochemical attack.

b)

Fretting corrosion and Galvanic attack.

9.

Rusting is a _____________ process.

a)

Mechanical

b)

Chemical

c)

Physical

10.

Rusting is a special term, given to the corrosion metal is... .

a)

Au

b)

Pt

c)

Fe

d)

Ag

11.

What two things cause Iron to Rust ?

a)

Air and Oxygen

b)

Oxygen and Water

c)

Water and Carbon dioxide

d)

Carbon dioxide and Air

12.

What is the chemical name given to Rust ?

a)

Iron dioxide

b)

Steel oxide

c)

Iron oxide

d)

Carbon dioxide

13.

Rusting can be prevented by

a)

Alloying

b)

Tinning

c)

Galvanizing

d)

All of above

14.
What is the name of negative electrode?
a)
Cathode
b)
Anode
c)
Cation
d)
Anion
15.
What is the name of positive electrode?
a)
Cathode
b)
Anode
c)
Cation
d)
Anion
16.
Which of the following statement is TRUE regarding Anodic and Cathodic reactions?
a)
Both reactions take place simultaneously
b)
Both reactions take place one after another
c)
Both reactions must occur at a different rate
d)
Both reactions must occur at a fast rate
17.

two types of Noble metals

a)

gold and platinum

b)

iron and copper

c)

stainless steel and aluminum

d)

tin and brass

18.
Which of the following metals is very unreactive and unlikely to corrode. 
a)
Copper
b)
Gold
c)
sodium
d)
Potassium
19.

Coating of Zn, Al and Cd on steel are _________ , because their electrode potentials are lower

a)

Cathodic

b)

Anodic

c)

Not affecting

d)

Expensive

20.

The following metals would protect iron by electrons flowing to the iron is ... .

a)

Silver

b)

Gold

c)

Copper

d)

Magnesium

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