describe division of power between state …

The Constitution divides legislative authority between the Union and the States in three lists- the Union     List, the State List and the Concurrent List.
The Union Parliament has exclusive authority to frame laws on subjects enumerated in the list. These include foreign affairs, defense, armed forces, communications, posts and telegraph, foreign trade etc.
The States  alone can make laws. These include public order, police, administration of justice, prison, local governments, agriculture etc.
The Concurrent list comprises criminal and civil procedure, marriage and divorce, economic and special planning trade unions, electricity, newspapers, books, education, population control and family planning etc.
Both the Parliament and the State legislatures can make laws on subjects given in the Concurrent list, but the Centre has a prior and supreme claim to legislate on current subjects. In case of conflict between the law of the State and Union law on a subject in the Concurrent list, the law of the Parliament prevails.