EASY
Earn 100

Teflon coating is done in a number of items of daily use. Name any two such items and for what purpose this coating is done?

Important Questions on Electrochemistry

MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and Its Prevention
Corrosion is an electrochemical phenomenon. Explain.
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and Its Prevention
Identify the correct statement:
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and Its Prevention
Define the corrosion of metals.
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and Its Prevention
Define corrosion. Write two preventions from 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
What is corrosion? Explain two factors which affect corrosion.
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
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
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?
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and Its Prevention
Explain that corrosion of iron is due to formation of an electrochemical cell.
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and Its Prevention
When Fe metal is rusted, it is :
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and Its Prevention
Which is not correct method for prevention of iron from rusting?