WorksheetsCorrosion and its control
Total questions: 18
Worksheet time: 13mins
In electro chemical cell reduction reaction occurs at.....
Anode
Cathode
Electrolyte
Salt bridge
The correct statement about following chemical equation are (select all correct answers)
Zn + FeCl2 → ZnCl2 + Fe
Zn is oxidized
Zn is reduced
Fe is oxidized
Fe is reduced
About the corrosion the correct statement is
Only Iron metal undergo corrosion
Several metals undergo corrosion
Copper does not undergo corrosion
Gases undergo corrosion
With of the following does not relate to dry corrosion
Oxygen
Gases like Cl2, CO2, SO2, NOx,
Inorganic liquid
Moisture
Oxidation corrosion is more if oxide film is.... (Select all correct answers)
Porous
Stable and Non porous
Un stable
Volatile
Corrosion is.......... process
Oxidation
Reduction
Vaporization
Cooling
In wet (electrochemical) corrosion ...... part undergo corrosion
Cathode
Anode
Electrolyte
All of the above
Chemical formula of brown color Iron rust
Fe3O4
Fe2O3. 3H2O
FeSO4
Fe(OH)2
The metal with high reduction potential in galvanic series acts as
Anode and undergo corrosion
Cathode and undergo corrosion
Anode and protected
Cathode and protected
When the metal partly submerged in to water, the part of the metal below waterline acts as........ and...........
Cathode, protected
Anode, protected
Anode, corroded
Cathode, corroded
The metallic part less oxygenated acts as ....... and....
Anode, corroded
Cathode, corroded
Anode, Protected
Cathode, protected
The rate and extent of corrosion mainly depend on (select all correct answers)
Possition of a metal in galvanic series
Purity of metal
Relative area of anode and cathode
Nature o oxide film
Commonly used sacrificial anode in corrosion control is...
Fe
Mg
Cu
Ag
In impressed current cathodic protection, the base metal acts as
Anode
Cathode
Electrolyte
DC source
Galvanization is coating of ......metal on iron
Cu
Sn
Zn
Ni
Tinning is coating of ......metal on iron
Cu
Sn
Zn
Ni
In electroplating method the metallic coating occurs on
Anode
Cathode
DC power source
None
In electro less plating............ used instead of DC power source
Reducing agent
Oxidizing agent
Limiting agent
Catalyst
