Some previous years IIT questions:

2007 Paper1: Download
2007 Paper2: Download

2008 Paper1: Download
2008 Paper2: Download

2009 Paper1: Download
2009 Paper2: Download

2010 Paper1: Download
2010 Paper2: Download

2011 Paper1: Download
2011 Paper2: Download

2012 Paper1: Download
2012 Paper2: Download

2013 Paper1: Download
2013 Paper2: Download