Related InterviewSolutions

• What is the relationship between reaction rate and overvoltage for activation polarization?(a) na=±βlog(i0/i)(b) na=±βlog(I/i0)(c) na=±βlog(1-i0/i)(d) na=±βlog(1-i/i0)The question was posed to me in quiz.This is a very interesting question from Modern Theory Principles in portion Modern Theory Principles of Corrosion Engineering
• The change in Gibbs free energy is a path function and it is independent of the state of the system.(a) False(b) TrueI had been asked this question in a national level competition.Origin of the question is Modern Theory Principles in division Modern Theory Principles of Corrosion Engineering
• Which of the following mentioned is/are the types of polarization?(a) Activation polarization(b) Concentration polarization(c) Resistance polarization(d) Activation, concentration and resistance polarizationThis question was posed to me in homework.Enquiry is from Modern Theory Principles topic in portion Modern Theory Principles of Corrosion Engineering
• What is meant by an anode?(a) An electrode at which reduction process takes place(b) An electrode at which oxidation process takes place(c) An electrode at which neither the oxidation nor reduction takes place(d) An electrode at which both oxidation and reduction takes placeI got this question in exam.Asked question is from Modern Theory Principles topic in section Modern Theory Principles of Corrosion Engineering
• Which of the following metal is used as a solid interface for hydrogen gas in the standard hydrogen electrode?(a) Copper(b) Zinc(c) Gold(d) Platinized platinumI had been asked this question during an interview.I'd like to ask this question from Modern Theory Principles in division Modern Theory Principles of Corrosion Engineering
• Which of the following is correct regarding Polarization?(a) It is the deviation from equilibrium potential(b) It results from the change in net current flow(c) Magnitude is measured in terms of overvoltage(d) It is the deviation from equilibrium potential that occurred due to the change in net current flow and its magnitude is measured in terms of overvoltage.The question was posed to me during an interview.My question is based upon Modern Theory Principles topic in portion Modern Theory Principles of Corrosion Engineering
• What is the cathodic and anodic reactions respectively of Cu-Ag system?(a) Ag==>Ag^+2+2e and Cu^+2+2e==>Cu(b) Cu==>Cu^+2+2e and Ag==>Ag^+2+2e(c) 2Ag^+1+2e==>2Ag and Cu==>Cu^+2+2e(d) 2Ag==>2Ag^+1+2e and Cu^+2+2e==>CuI had been asked this question during an interview for a job.Question is taken from Modern Theory Principles in portion Modern Theory Principles of Corrosion Engineering
• Which of the following is the controlling factor of Activation polarization?(a) The activation energy of a reaction(b) Diffusion of ions in the solution(c) The temperature of a solution(d) The velocity of a solutionThe question was asked during an online exam.This question is from Modern Theory Principles topic in chapter Modern Theory Principles of Corrosion Engineering
• Which of the following diagrams shows the stability of metals over a range of pH and potential of a system?(a) Phase diagrams(b) Pourbaix diagrams(c) Phase diagrams and Pourbaix diagrams(d) Colling curvesI had been asked this question in homework.I'm obligated to ask this question of Modern Theory Principles topic in portion Modern Theory Principles of Corrosion Engineering
• What is the formula to calculate rate of oxidation or rate of reduction during equilibrium?(a) r0=rR=i0nF(b) r0=rR=i0/nF(c) r0=rR=i0n/F(d) r0=rR=nF/i0This question was posed to me in a national level competition.Question is taken from Modern Theory Principles topic in chapter Modern Theory Principles of Corrosion Engineering