The formula of rust is……………..

If carbon dioxide is dissolved in water it produces……………..acid.

Pyro chemical process means process which takes place in the presence of …………

Pyro chemical process among these:……………..

The purpose of smelting an ore is to …………….. it

The chemical process in which the ore is heated in the absence of air is called …………….

The method used to convert magnesite to oxide ore is ……………..

…………….. is substance added to ore to remove the gangue?

Which of the following is useful to remove basic gangue?

…………….. is used to carry pyro chemical process.