hey...CBSE releases its official sample papers for all subjects only at the end of the year...like in the month of October....so i dont think getting the the sample paper for 2011 would be possible now....

However...u might try to get a catch of the 2010 papers....they are easily available on their website...
Good luck :)

asee: http://www.google.co.in/#sclient=psy&hl=…