The process of converting hydrated alumina into anhydrous alumina is known as .......

Which process is used to convert hydrated alumina into anhydrous alumina?

In the isolation of metals,the calcination process usually results in:

Choose the correct code regarding the Roasting process.
$I$. It is the process of heating ore in air to obtain the oxide.
$II$. It is an exothermic process.
$III$. It is used for hydrated oxide and oxysalt ore.
$IV$. It is used after the concentration of ore.

The process of heating an ore in the presence of excess air to a temperature below its melting point is called:

Which of the following ores undergo calcination during the extraction process?