Is there an RSS feed for new/unanswered questions? I could not find any RSS feeds functionality.
All of the SE sites support various feeds, but I don't think there is an exlicit link in the
The feed for the main site is: https://drupal.stackexchange.com/feeds
Tags also have feeds, eg https://drupal.stackexchange.com/feeds/tag/7
For more information, you can read What other hidden or inobvious RSS feeds are available on Stack Exchange and its sites?