Bissoy.com
Doctors Medicines MCQs Q&A

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

Which of the following order is correct regarding the oxides of iron starting from metallic iron to gaseous oxygen interface? Correct Answer FeO, Fe3O4, and Fe2O3

The most oxygen-rich compound is found at the scale-gas interface whereas a metal-rich compound is found at the metal-scale interface. Therefore, the correct order is FeO(22.270% O2), Fe3O4(27.641% O2), and Fe3O4(30.057% O2).

Related Questions

Which of the following statement (s) is/are Correct? I. Metallic oxides are said to be basic oxides. II. Non-metallic oxides are basic in nature. III. All acids have similar chemical properties.
Which of the following statement(s) is/are correct?
1. Metallic oxides are said to be basic oxides.
2. Non-metallic oxides are basic in nature.
3. All acids have similar chemical properties.
Which of the following statements is correct regarding the oxidation number of Oxygen? I. The oxidation number of Oxygen in most compounds is -2. II. When Oxygen is bonded to Fluorine in compounds like Oxygen difluoride and Dioxygen diflouride, the Oxygen is assigned an oxidation number of +2 and +2 respectively. III. In peroxide, an Oxygen atom is assigned an oxidation number of -1 and in Superoxide, each oxygen atom is assigned an oxidation number of -1/2.
Which of the following materials are categories of ceramic materials? 1. Oxides – Alumina, Zirconia 2. Non-oxides – Carbides, Borides, Nitrides, and Silicides 3. Composites – Particulate reinforced combinations of oxides and non-oxides Select the correct answer using the code given below.
In a well aerated and agitated microbial culture, the 'supply' of oxygen is equal to 'demand' (uptake) of the growing culture. The KLa for such a system will be (KLa = volumetric mass transfer coefficient, C* = dissolved oxygen concentration in liquid in equilibrium with gaseous oxygen, C = instantaneous value of dissolved oxygen concentration, 'r' = specific oxygen uptake rate per unit weight of cells, X = dry weight of the cells per unit volume)
Which of the following is true regarding the metallic nature of minerals? I. Metallic nature is directly proportional to electropositive nature. II. Metallic nature in period increases. III. Metallic nature in groups increases.
Which of the following option is correct about oxidation and reduction? The addition of a non-metallic elements (removal of metallic elements) is called oxidation. The addition of metallic elements (removal of non-metallic elements) is called reduction.
Which of the following gases in the atmosphere is/are responsible for acid rains?
1. Oxides of sulphur
2. Oxides of nitrogen
3. Oxides of carbon
Select the correct answer:
Consider the following : 1. Oxides of Hydrogen 2. Oxides of Nitrogen 3. Oxides of Sulphur Which of the above is/are the cause/causes of acid rain?
What type of oxides is formed by metals? c) Oxides with pH 10 d) Amphoteric oxides