i had applied for adsense for a subdomain. now i want to shift that to a domain. and i have others website also. can i place adsense ad code on them. can i add adsense code on any website which i own. and one more ques, how many ads i can place on one page.
More specifically (and it states this on Google's page, no need to ask here) you can put up to 3 adsense for content boxes, one link box and 2 search boxes up on the same page. Any questions you have about Google's ToS you should be directing to them btw, Google responds to your questions in between 2-5 days.
Yes, of course they will. Wherever you place your adsense ads will be spidered by the Google adsense bot. I've seen it happen in as little as 15 seconds. Really. Be sure to read the entire adsense policies, TOS and webmaster guidelines VERY carefully. It's obvious you haven't done so already or you wouldn't be asking these questions. If you get banned from adsense you will not get a second chance so it is worth the time and effort to read through all of the conditions for use.