What is the role of leaching in the extraction of aluminium ? Write all the chemical reactions involved in it.

What is the role of cryolite in the metallurgy of aluminium ?

What is the role of coke in the extraction of iron from its oxides?

What is the role of graphite in the electrometallurgy of aluminium ?

Write the reactions involved in iodoform test.

What is the role of pyridine in the acylation reaction of amines?

Give the laboratory preparation of sulphur dioxide and write the chemical reaction involved .

How can you find out whether a given amine is a primary amine ? Write the chemical reaction involved in the test you perform.

Write a chemical reaction to illustrate saytzeff's