Hi, I'm actually new to adsense. I registered an account for pay-pay-click(PPC) but now I want to be paid on page impressions. Can someone tell me the procedure?
No. Adsense is primarily a PPC system. You may occasionally get CPM ads, but there is no way to choose that option and they tend to pay poorly. https://www.google.com/adsense/support/bin/answer.py?answer=18196