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WorksheetsCorrosion
Total questions: 20
Worksheet time: 19mins
Deterioration of metal due to the corrosive environment
Erosion
Corrosion
Both A & B
None of these
composition of Yellow Rust?
Fe203
Fe3O4
Fe2O3. 3H2O
Fe3O4.3H2O
Wet corrosion occurs due to?
Electrochemical Reaction
Chemical Reaction
BOTH 1 & 2
Anodic Reaction
If the medium is acidic and in the absence of oxygen what is the product?
Hydrogen
hydroxyl ion
hydroxyl and Hydrogen
Oxygen
The reaction which is taking place at anode is?
Oxidation
Loss of Electrons
Both A & B
Reduction
The reaction which is taking place at cathode?
Reduction
oxidation
Redox
All the three
If a Small pin hole is left on the surface of Iron when Zinc is coated, The rate of the corrosion ?
Decreases
Increases
Remain Unaffected
If a small pin hole is left when Iron is coated with Tin, Rate of corrosion?
Increases
Decreases
Remains Unaffected
H+ + ? → H2
Oxygen
Electron
hydrogen
oxygen and electron
? + e- → OH- + H2
H2
OH-
H2 O
H+
During corrosion process?
Inside of the object changing from an element to compound
The surface of the object Changing from an Element to compound
No reaction
The surface of the object changing from one element to another
condition required for the corrosion to take place?
Oxygen only
water only
Oxygen and water
Water and carbon dioxide
The rate of corrosion in the presence of Salt?
No effect
Speed up corrosion
Slows down corrosion
The process of corrosion is?
Natural
Spontaneous
Non spontaneous
Natural and Spontaneous
Smaller the anodic area and larger the cathodic area, rate of corrosion?
Increases
Decreases
Remains Same
Larger the anodic area and smaller the cathodic area, Rate of corrosion?
Decreases
Increases
Remains Same
Nature of the Corrosion product formed on Ti ?
Accelerates further Corrosion
Prevent Metal from Further Corrosion
Insoluble
Prevent metal From further corrosion because oxide layer is Insoluble.
When Two different metals come in contact with each other in a corrosive environment?
Differential Metal Corrosion Occurs
Galvanic corrosion occurs
Corrosion current is developed
All the three
With Increase in temperature the rate of corrosion?
Increases due to increase in conductivity and Diffusion of Ions
Decreases due to increase in diffusion of ions
Decreases due to increase in conductivity
Increases due to decrease in Diffusion of ions
When Fe and Zn come in contact with each other in a corrosive environment which is prone to corrosion?
Fe being anode undergoes corrosion
Fe being Cathode get prevented from corrosion
Zn being anode get prevented from Corrosion
Zn being cathode get prevented from corrosion
