Hi Tushar,
In order to know whether Google processed your RSS feed, is to give a search with complete URL in Google Search. If you get results means your RSS feed is processed & indexed by Google (same as we find for our website). But i mostly submit my RSS feed in RSS director, Google indexed those directory & thus my RSS feed get indexed. I use Google personalised page to check its proper functionality.
Secondly, to know the status or to submit your rss feed in google directory, i think you need to create a Google gadget & submit it in Google gadget directory under suitable category. For more information visit:
Google Help : Add to Google button
Thanks & Regards -- Ann