Iron produced at 750°C is in the solid state, it is porous and is known as

Sulphide ores are concentrated by

The constituent metals of bronze are

In the galvanization, the steel plate is protected by a coating of 

The molten metal withdrawn from the furnace is called

The material which combines with gangue to form slag is

The impurity present in the ores is 

  Extraction of the metals from their ores and preparation of alloys is called? 

 Limestone is

The process in which ore is heated in the absence of air is