How does calcination differ from roasting ?

A metal X present in rock salt is highly reactive and it is stored under kerosene to prevent it from catching fire. It exists in nature as XCI. Identify the metal 'X'. How can this metal be extracted from its Chloride ore, Write chemical equations to explain your answer? How is calcination different from roasting?

How does fumigation differ from spraying ?

How does a neutron differ from proton ?

How does an electron differ from a neutron ?

How does a proton differ from an electron ?

(a) Differentiate between roasting and calcination. (b)How is cast iron different from pig iron ? ("C") Explain magnetic separation method in detail.