What Am I Riddles

Question: I'm made up of 12 completely different letters but you can type me with just 1, what am I?

Question: What has an eye but cannot see, takes time to generate, and can dissipate in seconds?

Question: What speaks with its ear, listens with its mouth, and has 10 digits but no hands?

Question: I only come out when I see lights My colour is opposite of white Mostly, you don’t realize that I’m with you If you leave me, I’ll keep follow you I’ll always copy whatever you do You can’t touch me and I can’t touch you What am I?

Question: What is black when you buy it, red when you use it, and gray when you throw it away?