in my opinion, at high temperatures and pressures the answer would be :- none, i.e all metal oxides can be reduced by hydrogen.
Metallic oxides contain a metal element that tends to lose electrons, leading to the formation of hydroxide ions in water, making the oxide basic. Non-metallic oxides contain a non-metal element that tends to gain electrons, forming acidic compounds when dissolved in water. This difference in electron behavior influences the acidity/basicity of the oxides.
CuO, Ag2O, and MgO cannot be reduced by hydrogen because they are already in their elemental form (copper, silver, and magnesium, respectively) and are stable. Fe2O3 (iron oxide) and PbO (lead oxide) can be reduced to their respective metals by hydrogen through a chemical reaction where hydrogen acts as a reducing agent.
Metallic oxides are formed by the reaction of a metal with oxygen and tend to be basic in nature, while non-metallic oxides are formed by the reaction of a non-metal with oxygen and can be acidic, neutral, or basic. Metallic oxides typically conduct electricity, while non-metallic oxides do not.
Metallic oxides are compounds that consist of a metal atom bonded to one or more oxygen atoms. These oxides are typically formed when a metal undergoes oxidation by reacting with oxygen. Metallic oxides can have various properties and uses, depending on the specific metal and oxygen ratios involved.
Metallic oxides are basic because they dissociate to form the hydroxyl ions while the non-metallic oxides are acidic because they dissociate to form hydrogen ions.
Metallic oxides contain a metal element that tends to lose electrons, leading to the formation of hydroxide ions in water, making the oxide basic. Non-metallic oxides contain a non-metal element that tends to gain electrons, forming acidic compounds when dissolved in water. This difference in electron behavior influences the acidity/basicity of the oxides.
CuO, Ag2O, and MgO cannot be reduced by hydrogen because they are already in their elemental form (copper, silver, and magnesium, respectively) and are stable. Fe2O3 (iron oxide) and PbO (lead oxide) can be reduced to their respective metals by hydrogen through a chemical reaction where hydrogen acts as a reducing agent.
Metallic oxides are formed by the reaction of a metal with oxygen and tend to be basic in nature, while non-metallic oxides are formed by the reaction of a non-metal with oxygen and can be acidic, neutral, or basic. Metallic oxides typically conduct electricity, while non-metallic oxides do not.
Non-metallic oxides are acidic (Except hydrogen, oxygen, helium, neon, argon) whereas metallic oxides are generally amphoteric or alkali (Except chromium, molybdenum, tungsten, niobium, tantalum, technetium, rhenium, ruthenium, osmium, bismuth)
Metallic oxides are compounds that consist of a metal atom bonded to one or more oxygen atoms. These oxides are typically formed when a metal undergoes oxidation by reacting with oxygen. Metallic oxides can have various properties and uses, depending on the specific metal and oxygen ratios involved.
Metallic iron refers specifically to the iron that is in its metallic form in sponge iron. Total iron in sponge iron includes metallic iron as well as any iron present in other forms such as iron oxides. Therefore, metallic iron is a subset of total iron in sponge iron.
Most of the non-metallic oxides are acidic in nature as CO2, SO3 and P2O5 but some non-metallic oxides are neutral as oxides of nitrogen.
Metallic oxides are basic because they dissociate to form the hydroxyl ions while the non-metallic oxides are acidic because they dissociate to form hydrogen ions.
Apart from dinitrogen monoxide, nitrogen oxide and carbon monoxide, every non metallic oxides are acidic in nature.
It reduces the oxides acting as a reducing agent.
Silicon is a metalloid that is a common component in metallic oxides. It is often found in silica, which is a primary component of metal oxides such as aluminum oxide. Silicon's properties make it useful in enhancing the properties of metallic oxides in various industrial applications.
They are also known as acidic oxides since they form acidic solutions in water.