Question 1: Choose the correct answer for each of the following questions. 1. The process of deterioration of a metal due to unwanted chemical or electrochemical interaction of metal with its environment is called (a) Electrolysis (b) Electrodialysis (c) Corrosion (d) Deposition 2. Which of the following is an example of corrosion? (a) Rusting of iron (b) Tarnishing of silver (c) Liquefaction of ammonia (d) both (a) and (b) 3. The electrode potential depends upon (a) Electrolyte (b) Concentration of ions (c) Temperature (d) All of the above
Question 1: Choose the correct answer for each of the following questions. 1. The process of deterioration of a metal due to unwanted chemical or electrochemical interaction of metal with its environment is called (a) Electrolysis (b) Electrodialysis (c) Corrosion (d) Deposition 2. Which of the following is an example of corrosion? (a) Rusting of iron (b) Tarnishing of silver (c) Liquefaction of ammonia (d) both (a) and (b) 3. The electrode potential depends upon (a) Electrolyte (b) Concentration of ions (c) Temperature (d) All of the above
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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![Question 1: Choose the correct answer for each of the following questions.
1.
The process of deterioration of a metal due to unwanted chemical or electrochemical interaction of metal
with its environment is called
(a) Electrolysis
(b) Electrodialysis
(c) Corrosion
(d) Deposition
2.
Which of the following is an example of corrosion?
(a) Rusting of iron
(b) Tarnishing of silver
(c) Liquefaction of ammonia
(d) both (a) and (b)
3.
The electrode potential depends upon
(a) Electrolyte
(b) Concentration of ions
(c) Temperature
(d) All of the above
4.
Which of the following represents the standard conditions
(a) [M*™] = 1, P = 1 bar, T = 25°C
(b) [M*™] = 1×10-6, P = 1 atm, T=25°C
(c) [M*™] = 1, P = 1 atm, T = 25°C
(d) [M*™] = 1, P = 1 atm, T = 30 °C
5.
1 Faraday is equals to
(a) 1 coulomb
(b) 1000 coulomb
(c) 5000 coulomb
(d) 96500 coulomb
6.
A protective passive film shows
(a) Stability over a small potential
(b) High ionic conductivity
(c) Low solubility and slow dissolution in the aqueous medium (d) All of the above
7.
Pourbaix (E-pH) diagram for metals
(a) Predicts the spontaneous direction of reaction
(b) Estimates the composition of corrosion products
(c) Predicts the environmental changes that will prevent corrosion attack
(d) All of the above
8.
For equal current of 1 mA, which cone of the following will corrode severely?
(a) Electrode with 1 cm² area
(b) Electrode with 5 cm² area
(c) Electrode with 10 cm² area
(d) Electrode with 100 cm² area
9.
Concentration polarization is due to
(a) Charge transfer across the electrode/electrolyte surface
(b) Changes in the ions concentration near the electrode/electrolyte interface
(c) Either (a) or (b)
(d) None of the above
10.
Passive films are protective if they are
(a) Adherent
(b) Dense
(c) Compact
(d) All of the above](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4579e092-47b0-4b67-84f8-b69f05955071%2F28f4fda2-c20d-40f5-a2db-d0ac6b7b0b67%2Fzneuly6_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Question 1: Choose the correct answer for each of the following questions.
1.
The process of deterioration of a metal due to unwanted chemical or electrochemical interaction of metal
with its environment is called
(a) Electrolysis
(b) Electrodialysis
(c) Corrosion
(d) Deposition
2.
Which of the following is an example of corrosion?
(a) Rusting of iron
(b) Tarnishing of silver
(c) Liquefaction of ammonia
(d) both (a) and (b)
3.
The electrode potential depends upon
(a) Electrolyte
(b) Concentration of ions
(c) Temperature
(d) All of the above
4.
Which of the following represents the standard conditions
(a) [M*™] = 1, P = 1 bar, T = 25°C
(b) [M*™] = 1×10-6, P = 1 atm, T=25°C
(c) [M*™] = 1, P = 1 atm, T = 25°C
(d) [M*™] = 1, P = 1 atm, T = 30 °C
5.
1 Faraday is equals to
(a) 1 coulomb
(b) 1000 coulomb
(c) 5000 coulomb
(d) 96500 coulomb
6.
A protective passive film shows
(a) Stability over a small potential
(b) High ionic conductivity
(c) Low solubility and slow dissolution in the aqueous medium (d) All of the above
7.
Pourbaix (E-pH) diagram for metals
(a) Predicts the spontaneous direction of reaction
(b) Estimates the composition of corrosion products
(c) Predicts the environmental changes that will prevent corrosion attack
(d) All of the above
8.
For equal current of 1 mA, which cone of the following will corrode severely?
(a) Electrode with 1 cm² area
(b) Electrode with 5 cm² area
(c) Electrode with 10 cm² area
(d) Electrode with 100 cm² area
9.
Concentration polarization is due to
(a) Charge transfer across the electrode/electrolyte surface
(b) Changes in the ions concentration near the electrode/electrolyte interface
(c) Either (a) or (b)
(d) None of the above
10.
Passive films are protective if they are
(a) Adherent
(b) Dense
(c) Compact
(d) All of the above
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