Multiple Choice Questions on Basic Science-Chemistry Set-2

MCQ on Metal Corrosion, its Prevention and Electrochemistry

1. Chemical action during corrosion converts metal into metallic component as ________

• hydroxide
• oxide
• sulphate
• all of the above

Answer : D

2. Which of the following can be used for cathodic protection

• Al
• Cd
• Cu
• none of the above

Answer : A

3. Corrosion of metals involves

• Physical reactions
• Chemical reactions
• Both A & B
• None

Answer : B

4. Which type of chemical reaction is observed at cathode, in electrochemical corrosion?

• Oxidation reaction
• Peretectic reaction
• Reduction reaction
• None of the above

Answer : C

5. The erosion corrosion can be controlled by _______

• increasing the flow velocity through pipes
• increasing temperature of fluid
• minimizing turbulence
• all of the above

Answer : C

6. Which of the following methods is not used to coat metallic elements to prevent corrosion?

• Electroplating
• Metal cladding
• Metal spraying
• None of the above

Answer : D

7. The following factors play vital role in corrosion process

• Temperature
• Solute concentration
• Both A & B
• None

Answer : C

8. What is meant by corrosion?

• Chemical reaction between anode, cathode and electrolyte, which leads to loss of metal
• Deterioration of metals due to reaction with its environment
• Both A and B
• None of the above

Answer : C

9. This form of corrosion occurs due to concentration difference in a component

• Uniform
• Galvanic
• Inter-granular
• Stress

Answer : C

10. Corrosion fatigue is a combined effect of _____

• Corrosive environment and mechanical stresses
• Cyclic loading and corrosion
• Velocity and mechanical stresses
• None of the above

Answer : B

11. Knife Line Attack is a type of _______

• bimetal corrosion
• intergranular corrosion
• localized corrosion
• uniform corrosion

Answer : B

12. Metals does not exist in nature in the form of ___________

• Nitrates
• Sulphates
• Carbonates
• Oxides

Answer : A

13. Which of the following is the most stable state of metal?

• Ore of metal
• Pure metal
• Corroded metal
• Metal ion

Answer : A

14. On electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will beOn electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will be

• hydrogen
• oxygen
• hydrogen sulphide
• sulphur dioxide

Answer : B

15. The process of deterioration of a metal due to unwanted chemical or electrochemical interaction of the metal with its environment is called ___________

• Electrolysis
• Electrodialysis
• Corrosion
• Deposition

Answer : C

16. Primary cells are electrochemical devices that convert chemical energy into

• mechanical energy
• electrostatic energy
• electric energy
• heat energy

Answer : C

17. When heating one end of a metal plate, the other end gets hot because of

• resistance of the metal
• mobility of atoms in the metal
• energised electrons moving to the other end
• minor perturbation in the energy of atoms

Answer : A

18.Which of the following is an example of corrosion?

• Rusting of iron
• Tarnishing of silver
• Liquefaction of ammonia
• Rusting of iron and tarnishing of silver

Answer : D

19. Select the incorrect statement from the following option.

• Replacement of corroded equipment is time-consuming
• Corrosion causes contamination of product
• Corrosion increases the electrical conductivity of metals
• Corrosion causes leakage of toxic liquid or gases

Answer : C

20. Due to corrosion, useful properties of metals such as malleability, ductility and electrical conductivity are lost.

• True
• False

Answer : A

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MCQ on Chemical bonding and catalysis
MCQ on Metal Corrosion, its Prevention and Electrochemistry
MCQ on Paints, Varnishes, Insulators, Polymer, Adhesives and Lubricants