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What is cathodic protection of iron?

Important Questions on Electrochemistry

EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Iron scraps are advisable and advantageous than zinc scraps for reducing the low grade copper ores. Why?
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Identify the correct statement:
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Define corrosion. Write two preventions from corrosion.
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
What is corrosion? Explain two factors which affect corrosion.
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Iron gets rust, but Gold doesn’t, why?
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Corrosion is an electrochemical phenomenon. Explain.
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Blocks of magnesium are fixed to the bottom of a ship to
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
To protect iron against corrosion the most durable metal plating on it is?
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
What is sacrificial protection?
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Rusting of iron is said to be an electrochemical phenomenon. Give reason for this.
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
What is corrosion? Explain its mechanism and write any two measures of its prevention.
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Write two conditions necessary for the corrosion to occur. 
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Match the following:

Group-A Group-B
(i) Corrosion (a) Lanthanides
(ii) Gold sol (b) Used in treatment of cancer

(iii) Radon

 (c) Purple of cassius
(iv) f-block elements

(d) Barbituric acid
(v) Tranquilizers (e) Hydrated ferric oxide.

 

EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Define the corrosion of metals.
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Galvanization is applying a coating of:
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Define the term: Corrosion
Write two applications of electrochernical series.

MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Out of zinc and tin, whose coating is better to protect iron objects?
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Zn acts as a sacrificial or cathodic protection to prevent the rusting of iron because:
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Which metal cannot be used for cathodic protection of iron? (E° for Fe2+/Fe = – 0.45 V)
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Explain that corrosion of iron is due to formation of an electrochemical cell.