EASY
Earn 100

Air with a relative humidity of 100% is said to be

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Important Questions on Electrochemistry

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

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?
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Out of zinc and tin, whose coating is better to protect iron objects?
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
What is sacrificial protection?
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
What is corrosion? Explain its mechanism and write any two measures of its prevention.
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
Write two conditions necessary for the corrosion to occur. 
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
Define corrosion. Write two preventions from corrosion.
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.
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Blocks of magnesium are fixed to the bottom of a ship to
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Galvanization is applying a coating of:
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)
MEDIUM
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Why is the cooking temperature in pressure cooker higher than that in the open pan?
EASY
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
The process of Zinc -plating on iron sheet is known as
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention
Explain how rusting of iron is envisaged as setting up of an electrochemical cell.
HARD
Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Dehumidifier is used to reduce the humidity of air. In the following figure a dehumidifier is shown.

Question Image

At 400K, saturation vapour pressure =0.06atm.
At 300K, saturation vapour pressure =0.04atm.
If the above dehumidifier is operated for 1 hour how many gram of water will be collected from dehumidifier in nearest possible integer?