Is back in black standard tuning?
Guitars: standard tuning (E A D G B E).
What is the key of Back in Black?
Back in Black is written in the key of E.
Is back in black easy to play?
This is an all-time rock masterpiece, great fun to play, lots of interesting riffs - I think most people find it easier to play than it looks, but it'll likely still take you some practice. Like most AC/DC songs, simple ain't easy!