how is metal copper extracted from its pyrite ore? 

It can be extracted from copper pyrite which goes through the following step:

1. Crushing and pulverization:The big size of the ore is crushed and it is changed into a fine powder then it is taken for concentration.

2. Concentration:The obtained powder ore is concentrated by the froth floatation process. Then it is taken for roasting.

3. Roasting:It is then heated strongly in a reverberatory furnace. The volatile impurities such as sulphur, arsenic, etc are removed and pyrite ore is converted...

Elaborate on: a) Galvanizationb) Sherardizing

a)Galvanization:

The process of thin coating of zinc to the surface of iron sheets to prevent the rusting of iron by opposing the direct contact or iron to the atmosphere or buy forming electrochemical couple.

The galvanization process consists of the three basic steps i.e. surface preparation followed by fluxing and then it undergoes galvanizing. Material is loaded and then immersed in the molten zinc at degrees until the temperature is the same as zinc.

b) Sherardizing:

Sherardizing is the...

Write chemistry of lunar caustic

Silver nitrate is called lunar caustic because when it comes in contact with organic substances (e.g., skin , clothes) and reduced to metallic silver which is white like the iron lunar.

Silver Nitrate is a salt, which is colorless or of a white crystalline form. When this is exposed to light or any organic material, this becomes black in color. Silver Nitrate when heated decomposes and forms, Silver, Nitrogen dioxide and Oxygen.

2 AgNO3 2 Ag + 2 NO2 + O2