Silvering of mirror is done by
a) AgNO3 b) Ag2O3 c) Fe2O3 d) Al2O3
a) AgNO3
Silvering of a mirror is done by the chemical reaction of silver nitrate (AgNO3). Therefore, the correct option is (a) AgNO3.
The process of silvering a mirror involves depositing a thin layer of silver onto the surface of the mirror. This layer of silver creates the reflective surface that allows the mirror to reflect light.
Out of the given options, the correct answer is (a) AgNO3, which stands for silver nitrate. Silver nitrate is commonly used in the process of silvering mirrors.
To turn silver nitrate into silver, we need a reducing agent, which is typically a chemical compound containing an element with a lower oxidation state. In the case of silver nitrate, the reducing agent used is typically a solution of glucose or formaldehyde.
Here's how the process of silvering a mirror using silver nitrate usually works:
1. Clean and prepare the glass surface: The glass surface of the mirror needs to be thoroughly cleaned and prepared to ensure good adhesion of the silver layer. This is usually done by cleaning the glass with a detergent solution, rinsing it with distilled water, and then drying it.
2. Sensitize the glass surface: The next step involves sensitizing the glass surface with a chemical solution that helps the silver nitrate adhere to the glass. This solution often contains tin(II) chloride or tin(II) sulfate.
3. Apply the silver nitrate solution: The silver nitrate solution is then carefully applied to the sensitized glass surface. This solution contains silver ions (Ag+). The silver ions are the source of the silver layer that will be deposited onto the glass.
4. Apply the reducing agent: A reducing agent, such as a solution of glucose or formaldehyde, is applied to the silver nitrate solution on the glass surface. The reducing agent reacts with the silver ions, causing them to be reduced to metallic silver atoms. These silver atoms then deposit onto the glass surface, forming a thin layer of silver.
5. Rinse and dry the mirror: Once the silver layer has been formed on the glass, the mirror is rinsed with distilled water to remove any excess chemicals. After rinsing, the mirror is carefully dried to complete the silvering process.
So, to summarize, the correct choice for the silvering of a mirror out of the provided options is (a) AgNO3, which is silver nitrate.