Q. Which of the following is/are the causes for the poor oxidation resistance of metal oxide with high Pilling and Bed worth ratio?

View solution

Q. Which of the following is/are the ideal characteristics of the passive metal oxide layer?

View solution

Q. Which of the following metal has a nonprotective oxide?

View solution

Q. What is the value of the Pilling and Bed worth ratio of tungsten?

View solution

Q. Which of the following is/are the interface at which new metallic oxides (MO) are produced?

View solution

Q. The diffusion of either cation or oxygen ions usually controls the reaction rate of high-temperature metallic oxidation.

View solution

Q. Which of the following order is correct regarding the oxides of iron starting from metallic iron to gaseous oxygen interface?

View solution

Q. The relative thickness of each phase of a metallic oxide is determined by the rate of ionic diffusion through that phase.

View solution

Q. Which of the following metal(s) produces metal oxide at a metal-scale interface?

View solution

Q. Which of the following is/are the n-type semiconducting oxides?

View solution

Q. Which of the following is/are the p-type semiconducting oxides?

View solution

Q. In general, all oxides are nonstoichiometric in nature their composition varies from an ideal molecular formula.

View solution

Q. Which of the following is/are correct regarding the measurement of the rate of oxidation?

View solution

Q. Diffusion-controlled oxidation can be minimized by decreasing the concentration of ionic defects in the scale.

View solution

Q. What are the types of oxidation rate laws?

View solution

Q. Which of the following is/are correct regarding linear oxidation law?

View solution

Q. Which of the following metal doesn’t follow linear oxidation law?

View solution

Q. Which of the following is/are true regarding parabolic oxidation rate law?

View solution

Q. Which of the following metals follows logarithmic oxidation law?

View solution

Q. Metals that follow linear oxidation kinetics at low temperatures tend to oxidize catastrophicallyat high temperatures.

View solution