NO2(g)+SO2(g)-->NO(g)+SO3(g) here NO2 act as a oxidising agent
formaldehyde reacts with oxidised indole ring to give coloured complex .mercuric sulphate in sulphuric acid acts as the oxidising agent
as kmno4 acts as a strong reducing agent only in acid medium
Because it may remove oxygen from a metal oxide and is converted into SO3.
Fluorine is probably the answer wanted, but helium and possibly neon also fit the characterization.
In chemistry, reduction is defined as a phenomenon in which substance gets electron from other species, oxidation is defined as a process in which substance donates electron to other species. When a metal acts as reducing agent, the other substance (for which metal acts as reducing agent) gets electrons (from metal) and by definition goes on reduction, and the metal, in this process, donates electron so, metal itself undergoes to oxidation.
S+O2->SO2 Oxidation no. of sulphur changes from 0 to +4. Due to presence of d-orbitals(vacant) sulphur can extend its covalency & show oxidation states till +6, which is stable in sulphur (eg: SF6). Hence it acts as a reducing agent. Te+O2->TeO2 Oxidation no. of Te changes from 0 to +4. Unlike sulphur Te cannot show +6 oxidation state as it is highly unstable due to inert pair effect. Therefore there can only be a decrease in it oxidation state (it can decrease to -2, +2). Hence it acts as an oxidising agent.
2H2S(g) + SO2(g) --> 2H2O + 3S Fe2O3 catalyst and temperature 673K
Coke is used in furnaces as a reducing agent.
Vitamin C acts as an antioxidant by reducing the concentration of oxygen. This is possible as it is a reducing agent.
Reducing agent
formaldehyde reacts with oxidised indole ring to give coloured complex .mercuric sulphate in sulphuric acid acts as the oxidising agent
as kmno4 acts as a strong reducing agent only in acid medium
Because it may remove oxygen from a metal oxide and is converted into SO3.
Fluorine is probably the answer wanted, but helium and possibly neon also fit the characterization.
No it is not. Propane can be used as fuel during oxidation reaction however it is not an oxidizing agent. In a redox reaction such as combustion, propane acts as a reducing agent. Common agents are O2 and O3.
In chemistry, reduction is defined as a phenomenon in which substance gets electron from other species, oxidation is defined as a process in which substance donates electron to other species. When a metal acts as reducing agent, the other substance (for which metal acts as reducing agent) gets electrons (from metal) and by definition goes on reduction, and the metal, in this process, donates electron so, metal itself undergoes to oxidation.
Zinc is a transition element with general oxidation state as +2. It gets easily oxidised to its oxidation state of +2 by elements which are less reactive than zinc . For example: 2Zn + H2O --> Zn2O + H2