Explain method for preparing.
propene from propane.

Explain method for preparing. Propyne from actetylene

Explain the method of refining copper.

Give a method to prepare chlorotoluene from toluene.

Explain the method of preparation of copper by hydrometallurgy.

Suggest a method of preparation of benzaldehyde from toluene.

Write a method of preparation of phosphine from white phosphorus

Which among the following is the best method for the preparation of pure propane?

Explain any one method of preparation and structure of diborane.

Explain the method of obtaining pure aluminium from alumina by electrolysis. In this process the carbon rods are replaced from time to time. Why?

Write a method of preparation of primary amines.