How does roasting differ from calcination?,

How does drugs differ from medicines?

What is a colloidal solution? How does it differ from a true solution?

How does osmosis differ from diffusion ?

What is calcination?

How is cast iron different from pig iron ?

How is cast iron different from pig iron ?

How does oxygen differ from sulphur ?

What is sex-chromosome? How does it differ from autosome?

What is cleavage? How does it differ from normal cell division?

What is a colloid? How does colloid differ from crystalloid? "Colloid is a state of matter, not a class of matter"-discuss the statement.