GTU IMP Question | Chemistry Chapter Corrosion Of Metals And It's Prevention | Best GTU MCQ Material

GTU IMP Question ,Best Mcq Material  With GTU MCQ Quiz  With Solution And Notes PDFIn Chemistry Chapter Corrosion Of Metals And It's Prevention And More GTU Material

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Chemistry Most IMP MCQ  With GTU MCQ Solution (Q & A)

1. Corrosion of metals ___________.
   Answer : Oxidation

 2. Which type of corrosion occur in boiler?
   Answer : Uniform

 3. Galvanizing means protective coating of _________________ on Iron.
   Answer : Zn 

 4. To reduce corrosion welding should be avoided at __________ place.
   Answer : L, T, U

 5. Melting point of zinc is ____________ Fe.
   Answer : More than

 6. Steel is the alloy of _______.
   Answer : Iron and carbon 

 7. The reaction in which gaining of electron takes place is called ________.
   Answer : Reduction

 8. Which type of corrosion takes place when metal is exposed to air?
   Answer : Electrochemical corrosion

 9. Which of the following opted to reduce corrosion?
   Answer : Dehumidification

 10. In water line corrosion, the part of metal which is less in contact with oxygen experiences _________.
   Answer : Oxidation

 11. The process of cementation using zink as coating material on screw and other small parts of metal, is known as...
   Answer : Sheradizing 

 12. If the temperature increases, the conductivity of electrolytes?
   Answer : Decreases
 
 13. How many type of corrosion?
   Answer : 3

 14. Choose the factor in below which is responsible for corrosion?
   Answer : 01) Nature of oxide film
                  02) Nature of environment
                  03) PH of solution
                  04) Area of cathode and anode
                  05) Temperature
                  06) Moisture
                  07) Purity of metal

 15. Select a factor in below reduce corrosion.
   Answer : Modification of environment, Use of inhibitor, decrease moisture

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 16. What is the type of sodium phosphate and sodium chromate inhibitor?
   Answer : Anodic inhibitor

 17. What is used as an anode in lead storage cell?
   Answer : Lead

 18. In siradizing methode at which temperature iron articles to be coated with zinc dust inclosed drum?
   Answer : 350° - 450° C

 19. What is melting point of zinc?
   Answer : 419° C

 20. Which of the following is not an application of electrolysis?
   Answer : Spray Politing

 21. This type of corrosion taking place in stagnant steel water tank is __________ corrosion.
   Answer : Crevice

 22. Corrosion of metal is more in ______.
   Answer : Neutral

 23. Galvanizing is the process of coating ___________ metal over the other metal.
   Answer : Zn

 24. Binding firmly a homogeneous layer of a coating metal to the metal on one or both the sides is known as....
   Answer : Metal cladding

 25. Which of the following is not a factor affecting the rate of corrosion?
  Answer : Pressure

 26. Crevice corrosion mainly occurs at ____________ .
   Answer : Junction of two metals

 27. Which of the following metal is used as saraficial anode?
   Answer : Zn

 28. The corrosion protection method useful in case of buried structure is _____ .
   Answer : Electroplating

 29. Metal under goes _________ in the process of corrosion.
   Answer : Oxidation

 30. Which type of coal has highest amount of moisture ?
   Answer : Anthracite

 31. Which of the following methods is use for corrosion prevention?
   Answer : heating

 32. Corrosion can be prevented by 
   Answer : Alloying, tinning, galvanizing

 33. Dry corrosion is depends upon.
   Answer : Temperature, capacity of the reaction, chemical affinity

 34. The process of applying thin coating of zinc on the iron or base metal surface is called ______.
   Answer : Galvanizing

 35.  The process of applying thin coating of tin on the iron or base metal surface is called ______.
   Answer : Tinning

 36. The substance which reduce the rate of corrosion or stop corrosion are known as...
   Answer : Inhibitors

 37. To remove or reduce the moisture from atmosphere is called __________ .
   Answer : Dehumidification

 38. The substance which can decrease the cathodic reduction of oxygen on addition to the corroding liquid medium is known as...
   Answer : Cathodic Inhibitors

 39. Coating of Chromium, Zinc, Nickel, Tim, etc. Carried out on any metallic surface is known as __________ .
   Answer : Electroplating

 40. Galvanization is a method to
   Answer : Protect the iron metal from corrosion

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