Hi Omkar,
Please find the related documents
http://msdn.microsoft.com/en-us/library/bb677622.aspx
http://blogs.technet.com/b/dataplatforminsider/archive/2011/11/01/my-top-5-sql-server-2012-features-by-aaron-bertrand-guest-blogger.aspx
http://mcpmag.com/articles/2012/03/14/top-12-features-of-sql-server-2012.aspx
http://www.windowsitpro.com/article/sqlserverdenali/sql-server-2012-141978
Best Regards
Marius