Explain the method of preparation of copper by hydrometallurgy.

Explain the method of refining copper.

What is hydrometallurgy?

Write a method of preparation of primary amines.

Write any one method for preparation of glucose.

Ferric hydroxide sol can be prepared from freshly perpared ferric hydroxide precipitate. It can also be prepared by adding ferric chloride solution to boilling water. In both cases the sol particles are positively charged. Name the above two methods of preparation of ferric hydroxide sol.

Write a method for the preparation of H_2O_2

Explain any one method of preparation and structure of diborane.

Explain method for preparing. propene from propane.

Write a method for the preparation of alkyl halides.