i also heard that if there are two partners of a website then each of them can put his own adsense account.... but i am not sure about this.... please guide if not true...
Yes it is possible .But if you can put the ads in different pages of same domain then it would give you good exposure and earning. Meanwhile your CTR will be balanced to both accounts.
You won't get paid for the clicks unless the website is on the list of approved sites that you build.. While you could put the code two different ad accounts on the same website with no penalty.... the question is will you get paid for your clicks with both accounts. I would be interested in hearing if you are successfully able to put the same webite on your approved sites list for two different accounts... also I would be interested in hearing what your motivation is for doing something that sounds so ridiculous. I have never heard of someone even wanting to do something like that before.